PMID: 11932169Apr 5, 2002Paper

Comparison of exercise and dobutamine echocardiography in the haemodynamic assessment of small size mechanical aortic valve prostheses

European Journal of Cardio-thoracic Surgery : Official Journal of the European Association for Cardio-thoracic Surgery
I KadirG D Angelini

Abstract

Doppler echocardiographic evaluation of prosthetic heart valve function is usually performed at rest although this situation is not representative of patients' daily activities. Following aortic valve replacement, patients most likely to remain symptomatic are those with a small aortic root and dobutamine or exercise echocardiography has been proposed to elicit the presence of abnormal haemodynamics or persistently elevated transvalvular gradients in these patients. This study was carried out to compare dobutamine echocardiography with a symptom limited treadmill exercise echocardiography in patients following aortic valve replacement with a small size (19 mm) St. Jude Mechanical valve prosthesis. The study population consisted of ten unselected patients following aortic valve replacement. Dobutamine was infused intravenously starting at 5 microg/kg/min and increasing by 5 microg/kg/min at 15 min interval up to 20 microg/kg/min. Heart rate, blood pressure, cardiac output (CO), peak and mean gradients as well as effective orifice area (EOA) were measured. These parameters were also measured following a symptom limited treadmill exercise. Dobutamine stress increased heart rate (HR) and CO by 50 and 74%, respectively (both P<0.000...Continue Reading

Citations

Jun 24, 2004·Echocardiography·Wen-Chih WuAra Sadaniantz
Sep 21, 2006·Journal of Cardiothoracic Surgery·Giovanni MinardiFrancesco Musumeci
Dec 21, 2011·Journal of Cardiothoracic Surgery·Jon OffstadJan L Svennevig
Jul 27, 2007·Echocardiography·John BarbetseasChristodoulos Stefanadis
Nov 22, 2008·The Annals of Thoracic Surgery·Mariano VicchioMaurizio Cotrufo
May 2, 2015·Asian Cardiovascular & Thoracic Annals·Edvin PriftiVitttorio Vanini
Oct 19, 2012·Tidsskrift for den Norske lægeforening : tidsskrift for praktisk medicin, ny række·Helge Skulstad, Svend Aakhus

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