Effect of contrast enhancement on transthoracic echocardiographic assessment of left ventricular regional wall motion.

young adults. Circulation 1993;88:2149–2155. 9. Meeder JG, Peels HO, Blanksma PK, Tan ES, Pruim J, Van der Wall EE, Vaalburg W, Lie KI. Comparison between positron emission tomography, myocardial perfusion imaging, and intracoronary Doppler flow velocity measurements at rest and during cold pressor testing in angiographically normal coronary arteries in patients with one vessel coronary artery disease. Am J Cardiol 1996;78:526–531. 10. Zeiher MA, Drexler H, Wollschlaeger H, Saurbier B, Just H. Coronary vasomotion in response to sympathetic stimulation in humans:importance of the functional integrity of the endothelium. J Am Coll Cardiol 1989;14:1181–1190. 11. Hutchison SJ, Soldo SJ, Gadallah S, Kawanishi DT, Chandraratna PAN. Determination of coronary flow measurements by transesophageal echocardiography. Dependence of flow velocity reserve on the location of stenosis. Am Heart J 1997;133:44–52. 12. Strauer BE. The significance of coronary reserve in clinical heart disease. J Am Coll Cardiol 1990;15:775–783. 13. Vita JA, Treasure CB, Nabel EG, McLenachan JM, Fish DR, Yeung AC, Vekshtein VI, Selwyn AP, Ganz P. Coronary vasomotor response to acetylcholine relates to risk factors for coronary artery disease. Circulation 1990;81:491– 497. 14. Gadallah S, Thaker KB, Kawanishi D, Mehra A, Lau S, Rashitan M, Chandraratna PAN. Comparison of intracoronary guide wire and transesophageal echocardiography in measurement of flow velocity and coronary flow reserve in the left anterior descending coronary artery. Am Heart J 1998;135:38–42. 15. Hutchison JS, Shen A, Soldo S, Hla A, Kawanishi KD, Chandraratna PAN. Transesophageal assessment of coronary flow velocity reserve during “regular” and “high” dose dipyridamole stress testing. Am J Cardiol 1996;77:1164–1168. 16. Hutchison JS, Thaker BK, Chandraratna PAN. Effects of intraaortic balloon counterpulsation on flow velocity in stenotic left main coronary arteries from transesophageal echocardiography. Am J Cardiol 1994; 74:1063–1065. 17. Kozakova M, Palombo C, Pratali L, Pittella G, Galetta F. Labbate A. Mechanisms of coronary flow reserve impairment in human hypertension. An integrated approach by transthoracic and transesophageal echocardiography. Hypertension 1997;29:551–559.