My area of research is congenital heart disease. The focus is a) the use of echocardiography to assess cardiac and vascular function with and without exercise and also b) fetal echocardiography.


Stress Echocardiographic Evaluation for D-Transposition of the Great Arteries after Atrial Redirection: Unmasking Early Signs of Myocardial Dysfunction and Baffle Stenosis.
Dvir-Orgad M, Anand M, De Souza AM, Zadorsky MT, Kiess MC, Potts JE, Sandor GG
DOI: 10.1016/j.echo.2016.09.005
PubMed: 28341033

Echocardiographic Tests of Left Ventricular Function in Pediatric Cardiology: Are We Searching for the Holy Grail?
Sandor GG
DOI: 10.1016/j.cjca.2015.10.031
PubMed: 26922289

Noninvasive Assessment of Vascular Function in Postoperative Cardiovascular Disease (Coarctation of the Aorta, Tetralogy of Fallot, and Transposition of the Great Arteries).
Mivelaz Y, Leung MT, Zadorsky MT, De Souza AM, Potts JE, Sandor GG
DOI: 10.1016/j.amjcard.2016.05.055
PubMed: 27401272

Characterization of Myocardial Repolarization Reserve in Adolescent Females With Anorexia Nervosa.
Padfield GJ, Escudero CA, DeSouza AM, Steinberg C, Gibbs K, Puyat JH, Lam PY, Sanatani S, Sherwin E, Potts JE, Sandor G, Krahn AD
DOI: 10.1161/circulationaha.115.016697
PubMed: 26769740

An Echocardiographic Study of Left Ventricular Size and Cardiac Function in Adolescent Females with Anorexia Nervosa.
Escudero CA, Potts JE, Lam PY, De Souza AM, Mugford GJ, Sandor GG
DOI: 10.1002/erv.2409
PubMed: 26449643

Aortic and Cardiac Structure and Function Using High-Resolution Echocardiography and Optical Coherence Tomography in a Mouse Model of Marfan Syndrome.
Lee L, Cui JZ, Cua M, Esfandiarei M, Sheng X, Chui WA, Xu MH, Sarunic MV, Beg MF, van Breemen C, Sandor GG, Tibbits GF
DOI: 10.1371/journal.pone.0164778
PubMed: 27824871

Design and rationale of a prospective, collaborative meta-analysis of all randomized controlled trials of angiotensin receptor antagonists in Marfan syndrome, based on individual patient data: A report from the Marfan Treatment Trialists' Collaboration.
Pitcher A, Emberson J, Lacro RV, Sleeper LA, Stylianou M, Mahony L, Pearson GD, Groenink M, Mulder BJ, Zwinderman AH, De Backer J, De Paepe AM, Arbustini E, Erdem G, Jin XY, Flather MD, Mullen MJ, Child AH, Forteza A, Evangelista A
DOI: 10.1016/j.ahj.2015.01.011
PubMed: 25965707

Obesity and arterial stiffness in children: systematic review and meta-analysis.
Cote AT, Phillips AA, Harris KC, Sandor GG, Panagiotopoulos C, Devlin AM
DOI: 10.1161/atvbaha.114.305062
PubMed: 25633314

A randomized, double blind pilot study to assess the effects of losartan vs. atenolol on the biophysical properties of the aorta in patients with Marfan and Loeys-Dietz syndromes.
Sandor GG, Alghamdi MH, Raffin LA, Potts MT, Williams LD, Potts JE, Kiess M, van Breemen C
DOI: 10.1016/j.ijcard.2014.11.082
PubMed: 25465809

Genetic variants in SLC22A17 and SLC22A7 are associated with anthracycline-induced cardiotoxicity in children.
Visscher H, Rassekh SR, Sandor GS, Caron HN, van Dalen EC, Kremer LC, van der Pal HJ, Rogers PC, Rieder MJ, Carleton BC, Hayden MR, Ross CJ, CPNDS consortium
DOI: 10.2217/pgs.15.61
PubMed: 26230641

Response to: echocardiography assessment of the aorta in children with chronic kidney disease.
Alghamdi M, De Souza AM, White CT, Potts MT, Warady BA, Furth SL, Kimball TR, Potts JE, Sandor GG
DOI: 10.1007/s00246-013-0776-3
PubMed: 24551878

Childhood obesity and cardiovascular dysfunction.
Cote AT, Harris KC, Panagiotopoulos C, Sandor GG, Devlin AM
DOI: 10.1016/j.jacc.2013.07.042
PubMed: 23954339

Noninvasive assessment of vascular function and hydraulic power and efficiency in pediatric Fontan patients.
Myers KA, Leung MT, Terri Potts M, Potts JE, Sandor GG
DOI: 10.1016/j.echo.2013.06.013
PubMed: 23860097

Echo-Doppler assessment of arterial stiffness in pediatric patients with Kawasaki disease.
AlHuzaimi A, Al Mashham Y, Potts JE, De Souza AM, Sandor GG
DOI: 10.1016/j.echo.2013.05.015
PubMed: 23800509

Validation of variants in SLC28A3 and UGT1A6 as genetic markers predictive of anthracycline-induced cardiotoxicity in children.
Visscher H, Ross CJ, Rassekh SR, Sandor GS, Caron HN, van Dalen EC, Kremer LC, van der Pal HJ, Rogers PC, Rieder MJ, Carleton BC, Hayden MR, CPNDS Consortium
DOI: 10.1002/pbc.24505
PubMed: 23441093

Physical activity recommendations for patients with electrophysiologic and structural congenital heart disease: a survey of Canadian health care providers.
Roston TM, De Souza AM, Sandor GG, Sanatani S, Potts JE
DOI: 10.1007/s00246-013-0654-z
PubMed: 23435716

Echo-Doppler assessment of the biophysical properties of the aorta in children with chronic kidney disease.
Alghamdi M, De Souza AM, White CT, Potts MT, Warady BA, Furth SL, Kimball TR, Potts JE, Sandor GG
DOI: 10.1007/s00246-013-0632-5
PubMed: 23381174

Anthracycline induced cardiac toxicity in pediatric Ewing sarcoma: a longitudinal study.
Brown TR, Vijarnsorn C, Potts J, Milner R, Sandor GG, Fryer C
DOI: 10.1002/pbc.24404
PubMed: 23382019

Postnatal outcome in patients with fetal tachycardia.
Moodley S, Sanatani S, Potts JE, Sandor GG
DOI: 10.1007/s00246-012-0392-7
PubMed: 22639009

Population-based review of tetralogy of Fallot with absent pulmonary valve: is prenatal diagnosis really associated with a poor prognosis?
Mivelaz Y, Lim KI, Templeton C, Campbell AI, Potts JE, Sandor GG
DOI: 10.1002/uog.11126
PubMed: 22302386

Biophysical properties of the aorta and left ventricle and exercise capacity in obese children.
Harris KC, Al Saloos HA, De Souza AM, Sanatani S, Hinchliffe M, Potts JE, Sandor GG
DOI: 10.1016/j.amjcard.2012.05.019
PubMed: 22728002

Balloon angioplasty for congenital aortic valve stenosis.
Sandor GG, Human DG, Potts JE
DOI: 10.1016/j.amjcard.2012.02.036
PubMed: 22546211

Pharmacogenomic prediction of anthracycline-induced cardiotoxicity in children.
Visscher H, Ross CJ, Rassekh SR, Barhdadi A, Dubé MP, Al-Saloos H, Sandor GS, Caron HN, van Dalen EC, Kremer LC, van der Pal HJ, Brown AM, Rogers PC, Phillips MS, Rieder MJ, Carleton BC, Hayden MR, Canadian Pharmacogenomics Network for Drug Safety Consortium
DOI: 10.1200/jco.2010.34.3467
PubMed: 21900104

Exercise-induced intrapulmonary arteriovenous shunt in healthy women.
Kennedy JM, Foster GE, Koehle MS, Potts JE, Sandor GG, Potts MT, Houghton KM, Henderson WR, Sheel AW
DOI: 10.1016/j.resp.2012.01.004
PubMed: 22285797

An unusual case of cyanosis in right ventricular dysplasia in a child.
Dhillon SS, Duncan WJ, Harris KC, Sandor GG
DOI: 10.1016/j.jacc.2011.07.057
PubMed: 22361406

Successful treatment of acute lymphoblastic leukemia in a child with trisomy 21 and complex congenital heart disease with mechanical prosthetic valve.
Alvi S, Shereck E, Heran MK, Sandor GG, Rassekh SR
DOI: 10.1155/2012/193093
PubMed: 23082266

Serial measurements of exercise performance in pediatric heart transplant patients using stress echocardiography.
Yeung JP, Human DG, Sandor GG, De Souza AM, Potts JE
DOI: 10.1111/j.1399-3046.2010.01467.x
PubMed: 21492351

Primary pulmonary arterial hypertension and autoimmune polyendocrine syndrome in a pediatric patient.
Alghamdi MH, Steinraths M, Panagiotopoulos C, Potts JE, Sandor GG
DOI: 10.1007/s00246-010-9704-y
PubMed: 20411253

Early changes in the biophysical properties of the aorta in pre-adolescent children born small for gestational age.
Bradley TJ, Potts JE, Lee SK, Potts MT, De Souza AM, Sandor GG
DOI: 10.1016/j.jpeds.2009.10.002
PubMed: 19939406

Does biventricular pacing improve hemodynamics in children undergoing routine congenital heart surgery?
Jeewa A, Pitfield AF, Potts JE, Soulikias W, DeSouza ES, Hollinger AJ, Sandor GG, LeBlanc JG, Campbell AM, Sanatani S
DOI: 10.1007/s00246-009-9581-4
PubMed: 19936587

Facilitated cardiac recovery in fulminant myocarditis: pediatric use of the Impella LP 5.0 pump.
Andrade JG, Al-Saloos H, Jeewa A, Sandor GG, Cheung A
DOI: 10.1016/j.healun.2009.06.020
PubMed: 19782584

Abnormal flow in the posterior descending artery: an echo Doppler clue to the anomalous origin of left anterior descending coronary artery from the pulmonary trunk.
Myers KA, Potts MT, Sandor GG
DOI: 10.1007/s00246-009-9388-3
PubMed: 19225829

A novel method to estimate the aortic pressure waveform using B-mode ultrasound images acquired from a suprasternal view.
Leung MT, Dumont GA, Sandor GG, Potts M, Potts JE
DOI: 10.1109/iembs.2008.4650407
PubMed: 19163910

Echocardiographic Doppler demonstrates increasing aortic pulse wave velocity (PWV) in adult patients with renal disease.
Sandor GG, Potts JE, Bradley TJ
DOI: 10.1016/j.echo.2007.06.008
PubMed: 17681727

Loss of elastic fiber integrity and reduction of vascular smooth muscle contraction resulting from the upregulated activities of matrix metalloproteinase-2 and -9 in the thoracic aortic aneurysm in Marfan syndrome.
Chung AW, Au Yeung K, Sandor GG, Judge DP, Dietz HC, van Breemen C
DOI: 10.1161/circresaha.107.157776
PubMed: 17641224

A stress echocardiography study of cardiac function during progressive exercise in pediatric oncology patients treated with anthracyclines.
De Souza AM, Potts JE, Potts MT, De Souza ES, Rowland TW, Pritchard SL, Sandor GG
DOI: 10.1002/pbc.21122
PubMed: 17226848

A population-based study of cardiac malformations and outcomes associated with dextrocardia.
Bohun CM, Potts JE, Casey BM, Sandor GG
DOI: 10.1016/j.amjcard.2007.02.095
PubMed: 17631088

Endothelial dysfunction and compromised eNOS/Akt signaling in the thoracic aorta during the progression of Marfan syndrome.
Chung AW, Au Yeung K, Cortes SF, Sandor GG, Judge DP, Dietz HC, van Breemen C
DOI: 10.1038/sj.bjp.0707181
PubMed: 17339838

Device closure of a secundum atrial septal defect in a 4-month-old infant with a marginal left ventricle following coarctation repair.
Jean-St-Michel E, Hosking MC, Potts JE, Sandor GG
DOI: 10.1111/j.1747-0803.2007.00140.x
PubMed: 18377440

Exercise does not cause an arm-leg blood pressure gradient in healthy children.
Young CE, Sandor GG, Potts JE
DOI: 10.1136/hrt.2005.084384
PubMed: 16644859

Intra-atrial thrombus in a neonate with coarctation of the aorta.
Al Dhahri KN, Sandor GG, Duncan WJ
DOI: 10.1017/s1047951106000436
PubMed: 16839432

Right-sided cardiac involvement in osteogenesis imperfecta.
Khashu M, Pelligra G, Sandor GG, Singh AJ
PubMed: 16901059

Estimating arterial stiffness using transmission line model.
Leung M, Dumont G, Sandor GS, Potts JE
DOI: 10.1109/iembs.2006.260616
PubMed: 17946459

Is the nuchal index increased in fetuses with congenital structural heart defects?
Dahlgren LS, Duncan WJ, Farquarhson DF, Sandor GS, Skoll MA, Tessier F, Lim KI
DOI: 10.1159/000089057
PubMed: 16354985

Echocardiographic Doppler assessment of the biophysical properties of the aorta in pediatric patients with the Marfan syndrome.
Bradley TJ, Potts JE, Potts MT, DeSouza AM, Sandor GG
DOI: 10.1016/j.amjcard.2005.06.080
PubMed: 16253606

Diagnosis of fetal ductus arteriosus aneurysm: importance of the three-vessel view.
Jackson CM, Sandor GG, Lim K, Duncan WJ, Potts JE
DOI: 10.1002/uog.1927
PubMed: 15971287

Repair in infancy of right aortic arch with aberrant left brachiocephalic artery in the setting of a variant of the hypoplastic left heart syndrome.
Sett SS, Mawson JB, Sandor GG
DOI: 10.1017/s1047951104004147
PubMed: 15680052

Diagnosis and outcome of dextrocardia diagnosed in the fetus.
Walmsley R, Hishitani T, Sandor GG, Lim K, Duncan W, Tessier F, Farquharson DF, Potts JE
DOI: 10.1016/j.amjcard.2004.03.049
PubMed: 15219529

Pulmonary atresia with intact ventricular septum and antenatal left ventricular failure.
Khoshhal S, Sandor GG, Duncan WJ
DOI: 10.1017/s1047951104003178
PubMed: 15680033

Isolated haemangioma of the tricuspid valve.
Wong KK, Sandor GG, Sett SS
DOI: 10.1017/s1047951104003129
PubMed: 15680028

Parents' perspectives on decision making after antenatal diagnosis of congenital heart disease.
Rempel GR, Cender LM, Lynam MJ, Sandor GG, Farquharson D
DOI: 10.1177/0884217503261092
PubMed: 14971554

Myocardial contractility in premature neonates with and without patent ductus arteriosus.
Barlow AJ, Ward C, Webber SA, Sinclair BG, Potts JE, Sandor GG
DOI: 10.1007/s00246-003-0452-0
PubMed: 14648000

A novel Doppler echocardiographic method of measuring the biophysical properties of the aorta in pediatric patients.
Sandor GG, Hishitani T, Petty RE, Potts MT, Desouza A, Desouza E, Potts JE
DOI: 10.1016/s0894-7317(03)00407-3
PubMed: 12835661

Coronary arterial abnormalities in pulmonary atresia with intact ventricular septum diagnosed during fetal life.
Sandor GG, Cook AC, Sharland GK, Ho SY, Potts JE, Anderson RH
DOI: 10.1017/s1047951102000756
PubMed: 15773446

Pulmonary atresia with intact ventricular septum: range of morphology in a population-based study.
Daubeney PE, Delany DJ, Anderson RH, Sandor GG, Slavik Z, Keeton BR, Webber SA, United Kingdom and Ireland Collaborative Study of Pulmonary Atresia with Intact Ventricular Septum
DOI: 10.1016/s0735-1097(02)01832-6
PubMed: 12020496

"Masked" pulmonary venous obstruction in patients with isomerism of the right atrial appendages: an overstated association.
Becket Mahnke C, Sandor GG, Boyle GJ, Webber SA
DOI: 10.1017/s1047951102000252
PubMed: 12018714

Interrupted right aortic arch and origin of the left pulmonary artery from the aorta in DiGeorge syndrome.
Sett SS, Sandor GG, Mawson JB
DOI: 10.1017/s104795110100110x
PubMed: 11813925

Postpericardiotomy syndrome: no evidence for a viral etiology.
Webber SA, Wilson NJ, Junker AK, Byrne SK, Perry A, Thomas EE, Book L, Tipple M, Patterson MW, Sandor GG
DOI: 10.1017/s1047951100012440
PubMed: 11233400

Balloon angioplasty of right ventricular outflow tract conduits.
Sanatani S, Potts JE, Human DG, Sandor GG, Patterson MW, Gordon Culham JA
DOI: 10.1007/s002460010209
PubMed: 11343149

Echocardiography and pulmonary function testing in childhood onset systemic lupus erythematosus.
Al-Abbad AJ, Cabral DA, Sanatani S, Sandor GG, Seear M, Petty RE, Malleson PN
DOI: 10.1191/096120301669980721
PubMed: 11243507

Cardiac responses to progressive exercise in normal children: a synthesis.
Rowland T, Potts J, Potts T, Sandor G, Goff D, Ferrone L
DOI: 10.1097/00005768-200002000-00001
PubMed: 10694103

Coil occlusion of the patent ductus arteriosus: lessons learned.
Sanatani S, Potts JE, Ryan A, Sandor GG, Human DG, Culham JA
DOI: 10.1007/s002709910019
PubMed: 10795831

Outcome of fetuses diagnosed with atrioventricular septal defect.
Delisle MF, Sandor GG, Tessier F, Farquharson DF
DOI: 10.1016/s0029-7844(99)00389-0
PubMed: 10546725

Vascular abnormalities in Adams-Oliver syndrome: cause or effect?
Swartz EN, Sanatani S, Sandor GG, Schreiber RA
DOI: 10.1002/(sici)1096-8628(19990101)82:13.0.co;2-m
PubMed: 9916843

Cardiovascular responses to exercise in children and adolescents with myocardial dysfunction.
Rowland T, Potts J, Potts T, Son-Hing J, Harbison G, Sandor G
DOI: 10.1016/s0002-8703(99)70468-0
PubMed: 9878945

[Standards of pediatric echocardiography]
Smallhorn JF, Fouron JC, Robertson MA, Sandor G
PubMed: 9738158

Standards for training in pediatric echocardiography. Canadian Cardiovascular Society.
Fouron JC, Robertson MA, Sandor G
PubMed: 9706272

Kawasaki disease in the older child.
Momenah T, Sanatani S, Potts J, Sandor GG, Human DG, Patterson MW
DOI: 10.1542/peds.102.1.e7
PubMed: 9651459

Differences in dose scheduling as a factor in the etiology of anthracycline-induced cardiotoxicity in Ewing sarcoma patients.
Kakadekar AP, Sandor GG, Fryer C, Chan KW, Rogers PC, Pritchard S, Popov R
DOI: 10.1002/(sici)1096-911x(199701)28:13.0.co;2-v
PubMed: 8950332

Effectiveness of primary level antenatal screening for severe congenital heart disease: a population-based assessment.
Sinclair BG, Sandor GG, Farquharson DF
PubMed: 8915930

Short- and long-term variability of echocardiographic stress-velocity indexes of cardiac function in a pediatric population.
Sandor GG, Webber SA, Popov RO, DeSouza E, Johnston B
DOI: 10.1016/s0894-7317(96)90137-6
PubMed: 8736007

Influence of competitive pulmonary blood flow on the bidirectional superior cavopulmonary shunt. A multi-institutional study.
Webber SA, Horvath P, LeBlanc JG, Slavik Z, Lamb RK, Monro JL, Reich O, Hruda J, Sandor GG, Keeton BR
DOI: 10.1161/01.cir.92.9.279
PubMed: 7586424

Role of transesophageal echocardiography in the management of aortic-left ventricular tunnel.
Kakadekar AP, Sandor GG, Patterson MW, LeBlanc JG
DOI: 10.1007/bf00801913
PubMed: 7617509

Pulmonary artery banding is not contraindicated in double inlet left ventricle with transposition and aortic arch obstruction.
Webber SA, LeBlanc JG, Keeton BR, Salmon AP, Sandor GG, Lamb RK, Monro JL
DOI: 10.1016/s1010-7940(95)80052-2
PubMed: 8800701

Guidelines for monitoring of anthracycline cardiomyopathy: a rebuttal.
Steinherz LJ, Graham T, Hurwitz R, Sondheimer HM, Schaffer EM, Schwartz RG, Sandor G, Benson L, Williams R
PubMed: 7936926

Angiographic demonstration of endocardial fibroelastosis in an infant with critical aortic stenosis.
Ward CJ, Culham JA, Mawson J, Sandor GG
DOI: 10.1016/0002-8703(94)90071-x
PubMed: 8172080

Systolic and diastolic function in tricuspid valve atresia before the Fontan operation.
Sandor GG, Patterson MW, LeBlanc JG
DOI: 10.1016/0002-9149(94)90236-4
PubMed: 8296762

Double-blind placebo-controlled trial of corticosteroids in children with postpericardiotomy syndrome.
Wilson NJ, Webber SA, Patterson MW, Sandor GG, Tipple M, LeBlanc J
PubMed: 7997415

Pulmonary vascular disease in neonates with transposition of the great arteries and intact ventricular septum.
Kumar A, Taylor GP, Sandor GG, Patterson MW
DOI: 10.1136/hrt.69.5.442
PubMed: 8518068

Immunogenicity of Haemophilus influenzae type b conjugate vaccine in children with congenital asplenia.
Webber SA, Sandor GG, Patterson MW, Mitchell LA, Scheifele D, Ochnio JJ, McVerry PH
DOI: 10.1093/infdis/167.5.1210
PubMed: 8486956

Pulmonary wedge angiography for prediction of pulmonary vascular disease in Down syndrome.
Wilson NJ, Culham JA, Sandor GG, Taylor GP
DOI: 10.1002/ccd.1810280106
PubMed: 8416328

Autoantibody production after cardiopulmonary bypass with special reference to postpericardiotomy syndrome.
Webber SA, Wilson NJ, Fung MY, Malleson PN, Petty RE, Patterson MW, Sandor GG
DOI: 10.1016/s0022-3476(05)81907-9
PubMed: 1432426

Early prediction of anthracycline cardiomyopathy using standard M-mode and digitized echocardiography.
Sandor GG, Puterman M, Rogers P, Chan KW, Pritchard S, Popov R
PubMed: 1530119

Doppler echocardiographic observations of diastolic trans-septal flow through small ventricular septal defects.
Webber SA, Sandor GG, Patterson MW
DOI: 10.1093/oxfordjournals.eurheartj.a060229
PubMed: 1618207

Guidelines for cardiac monitoring of children during and after anthracycline therapy: report of the Cardiology Committee of the Childrens Cancer Study Group.
Steinherz LJ, Graham T, Hurwitz R, Sondheimer HM, Schwartz RG, Shaffer EM, Sandor G, Benson L, Williams R
PubMed: 1579408

Rate-corrected mean velocity of fiber shortening-stress at peak systole as a load-independent measure of contractility.
Sandor GG, Popov R, De Souza E, Morris S, Johnston B
DOI: 10.1016/0002-9149(92)90242-q
PubMed: 1734656

Efficacy and safety of oral sotalol in early infancy.
Tipple M, Sandor G
DOI: 10.1111/j.1540-8159.1991.tb02816.x
PubMed: 1721225

Doppler-derived mean aortic flow velocity in children: an alternative to cardiac index.
Seear MD, D'Orsogna L, Sandor GG, de Souza E, Popov R
DOI: 10.1007/bf02310565
PubMed: 1946006

Balloon dilatation of restrictive interatrial communications in congenital heart disease.
Webber SA, Culham JA, Sandor GG, Patterson MW
DOI: 10.1136/hrt.65.6.346
PubMed: 2054246

Congenital heart disease and Robinow syndrome: coincidence or an additional component of the syndrome?
Webber SA, Wargowski DS, Chitayat D, Sandor GG
DOI: 10.1002/ajmg.1320370418
PubMed: 2260599

Successful treatment of a nondeflatable balloon atrial septostomy catheter.
Wilson NJ, Culham JA, Sandor GG
DOI: 10.1007/bf02238846
PubMed: 2395743

Optimal choice of prognostic variables with an application to cardiac monitoring using M-mode echocardiography.
Puterman ML, Schumacher P, Sandor GG
DOI: 10.1002/sim.4780090310
PubMed: 2188326

The clinical value and risks of lung biopsy in children with congenital heart disease.
Wilson NJ, Seear MD, Taylor GP, LeBlanc JG, Sandor GG
PubMed: 2106601

Assessment of bedside umbilical vein balloon septostomy using two-dimensional echocardiographic guidance in transposition of great arteries.
D'Orsogna L, Lam J, Sandor GG, Patterson MW
DOI: 10.1016/0167-5273(89)90217-9
PubMed: 2613374

Influence of echocardiography in pre-operative cardiac catheterization in congenital heart disease.
D'Orsogna L, Sandor GG, Patterson MW, Ashmore PG, LeBlanc J, Culham JA
DOI: 10.1016/0167-5273(89)90036-3
PubMed: 2759753

Role of prenatal detection of cardiac tumours in the diagnosis of tuberous sclerosis--report of two cases.
Chitayat D, McGillivray BC, Diamant S, Wittmann BK, Sandor GG
DOI: 10.1002/pd.1970080805
PubMed: 3060871

Left ventricular systolic and diastolic function after two-stage anatomic correction of transposition of the great arteries.
Sandor GS, Freedom RM, Williams WG, LeBlanc J, Trusler G, Patterson MW, Ashmore PG
DOI: 10.1016/0002-8703(88)90018-x
PubMed: 3376844

Pulmonary artery banding: results and current indications in pediatric cardiac surgery.
LeBlanc JG, Ashmore PG, Pineda E, Sandor GG, Patterson MW, Tipple M
DOI: 10.1016/s0003-4975(10)62150-9
PubMed: 2446573

Left ventricular systolic and diastolic function after total correction of tetralogy of Fallot.
Sandor GG, Patterson MW, Tipple M, Ashmore PG, Popov R
DOI: 10.1016/0002-9149(87)90408-5
PubMed: 3687744

Successful balloon angioplasty of peripheral pulmonary stenosis in Williams syndrome.
D'Orsogna L, Sandor GG, Culham JA, Patterson M
DOI: 10.1016/0002-8703(87)90764-2
PubMed: 2957904

Normal serial variability for M-mode and digitized echocardiography in a pediatric population.
Sandor GG, Schumacher P, Puterman ML, Popov R
DOI: 10.1007/bf02308380
PubMed: 3601733

Effect of pressure loading, volume loading and surgery on left ventricular chamber and myocardial stiffness in congenital heart disease, with a reevaluation of normal pediatric values.
Sandor GG, Puterman ML, Patterson MW, Tipple MA, Vince DJ
DOI: 10.1016/s0735-1097(86)80053-5
PubMed: 3734258

Treatment of grafts and major vessel thrombosis with low-dose streptokinase in children.
LeBlanc JG, Culham JA, Chan KW, Patterson MW, Tipple M, Sandor GG
DOI: 10.1016/s0003-4975(10)63077-9
PubMed: 3718040

Fetal echocardiography: results in high-risk patients.
Sandor GG, Farquarson D, Wittmann B, Chow TC, Lau AE
PubMed: 3945447

Cardiovascular therapy in the newborn.
Sandor GG
PubMed: 3907921

Clinical and echocardiographic evidence suggesting afterload reduction as a mechanism of action of tolazoline in neonatal hypoxemia.
Sandor GG, Macnab AJ, Akesode FA, Ebelt VJ, Pendray MR, Ling WY, Patterson MW, Tipple MA
DOI: 10.1007/bf02424957
PubMed: 6473128

Successful palliation by pulmonary artery banding in absent pulmonary valve syndrome with aneurysmal pulmonary arteries.
Opie JC, Sandor GG, Ashmore PG, Patterson MW
PubMed: 6184577

Serum digoxin levels in neonates under 1500 grams.
Sandor GG, Reid G, Patterson MW
PubMed: 6646879

Determination of left ventricular diastolic chamber stiffness and myocardial stiffness in patients with congenital heart disease.
Sandor GG, Olley PM
DOI: 10.1016/0002-9149(82)91958-0
PubMed: 7064828

Serum digoxin levels in neonates whose weights are less than 1,500 grams.
Patterson MW, Reid G, Sandor GG
PubMed: 7162876

The ECG in aortic stenosis. Value of TAVF and QV6.
Fowler RS, Wood MM, Bain H, Patel RG, Sandor GG, Rowe RD
DOI: 10.1007/bf02240455
PubMed: 7155959

Reliability of systolic time intervals in diagnosis of transposition of great arteries in newborn.
Sandor GG, Patterson MW, Tipple M, Vince DJ
DOI: 10.1136/hrt.46.1.74
PubMed: 7272116

Intrinsic defects in the fetal alcohol syndrome: studies on 76 cases from British Columbia and the Yukon Territory.
Smith DF, Sandor GG, MacLeod PM, Tredwell S, Wood B, Newman DE
PubMed: 7195990

Long-term follow-up of patients after valvotomy for congenital valvular aortic stenosis in children: a clinical and actuarial follow-up.
Sandor GG, Olley PM, Trusler GA, Williams WG, Rowe RD, Morch JE
PubMed: 7401666

Noninvasive assessment of left ventricular function related to serum digoxin levels in neonates.
Sandor GG, Bloom KR, Izukawa T, Patterson MW, Rowe RD
PubMed: 7360542

Letter: Phototherapy and chromosome structure.
Sandor G
DOI: 10.1016/s0140-6736(73)93345-x
PubMed: 4128071

Premature rupture of membranes and effects of prophylactic antibiotics.
Habel AH, Sandor GS, Conn NK, McCrae WM
DOI: 10.1136/adc.47.253.401
PubMed: 4624593

Fingerprint changes in coeliac disease.
McCrae WM, Sandor G, Sangani AP, Stalker R
DOI: 10.1136/bmj.3.5766.109-c
PubMed: 5090799


Current Projects
Structure and function of the heart can be examined using ultrasound. My interest lies in using the latest ultrasound to characterize the heart’s ability to pump and to fill. This work attempts to accurately assess and diagnose abnormalities of function early, and to compare the results of different types of medical and surgical treatment to evaluate outcome. Our laboratory has been a pioneer in the simplification of non-invasive methods of assessing heart function and we have also developed a new technique to quantify the properties of the major blood vessels coming from the heart to see whether these are diseased or healthy. We are also examining the interaction of heart function with the properties of the blood vessels to see how efficient the heart and circulation are. These types of studies are of importance in patients who have some compromise of cardiac function, so that therapy may be optimised to enable the heart to work most efficiently.

Our laboratory has devised a technique whereby the heart can be imaged with ultrasound during exercise and with this technique are able to obtain indexes of cardiac function, cardiac output and examine the heart muscle contractility using stage exercise. This technique is unique and has been extremely useful in assessing the cardiac reserve in patients for whom decisions have to be made with regard to surgery, continuing potentially cardiotoxic medications and assessing the effects of these. This has been found very helpful in situations where the examination of the heart at rest has not provided enough information about the potential heart to do exercise. In addition, this technique has been very helpful in unmasking a partial blockage in blood vessels whereby exercise increased the cardiac output and has demonstrated a significant degree of obstruction that is not apparent in the resting state. We have undertaken some of this work for the Adult Congenital Heart Disease Program.

The antenatal diagnosis of congenital heart disease continues to develop and we have been one of the first centers to institute a fetal cardiac diagnosis program. This is unique in that it integrates perinatology and the fetal diagnosis program, which help in the management of these difficult situations. In addition to evaluating the accuracy of this technique, we have also examined issues of outcomes, population statistics and just as importantly, a qualitative study of such diagnoses. We have also started to use an adaptation of the technique of assessment of the vascular properties by ultrasound (alluded to in the previous paragraphs) to attempt to assess fetal circulatory health, and we hope that this test will give us further insights into placental insufficiency and perhaps an earlier diagnosis of such problems.