Ioannis P Panidis

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Doppler echocardiography was performed in 136 patients with a normally functioning prosthetic valve in the aortic (n = 59), mitral (n = 74) and tricuspid (n = 3) positions. These included patients with St. Jude (n = 82), Björk-Shiley (n = 18), Beall (n = 13), Starr-Edwards (n = 7) or tissue (n = 16) valves. Peak and mean pressure gradients across the(More)
To determine the cardiac rhythm disturbances underlying sudden death, 15 patients (14 inpatients and 1 outpatient) who had cardiac arrest unexpectedly while undergoing ambulatory electrocardiographic monitoring were identified. Heart disease was present in 11 patients and 7 patients were admitted to the hospital with chest pain before sudden cardiac death(More)
Continuous wave Doppler ultrasound is a noninvasive method of determining transvalvular gradients that may overestimate the gradients of prosthetic valves. It is theorized that a valve rotated or tilted in its annulus will create abnormally high velocities that calculate into derived gradients that are greater than those actually present. An in vitro(More)
Two-dimensional and Doppler echocardiography were performed in 17 consecutive hospitalized patients with cystic fibrosis aged 6 to 38 years (mean 21 +/- 9) and in 10 normal subjects aged 24 +/- 7 years. Left ventricular and right ventricular ejection fraction were measured by a computerized light pen system and Simpson's rule from two-dimensional(More)
Left ventricular hypertrophy is an important adaptive response to chronic pressure or volume overload of the left ventricle. The different types and the pathophysiologic mechanisms of the development of left ventricular hypertrophy in various disease states are reviewed. Detection of left ventricular hypertrophy may be accomplished by electrocardiography(More)