Results 201 to 210 of about 177,330 (252)

Variation in Tau, the time constant for isovolumic relaxation, along the left ventricular base-to-apex axis

Basic Research in Cardiology, 1999
Tau (tau), the time constant for isovolumic relaxation, is often used as a measure of cardiac diastolic function. However, several methods of calculating tau have been published which may produce different results and, thereby, different conclusions. The purpose of this study was to determine if the method of tau calculation effects the results when ...
S.J. Allen, U Mehlhorn, Hans J. Geissler, Glen A. Laine, E.R. Schertel, D. Trevas, K. L. Davis   +6 more
openaire   +3 more sources

247: Isovolumic relaxation time is prolonged in fetal long QT syndrome

American Journal of Obstetrics and Gynecology, 2017
Bettina F. Cuneo, Bettina F. Cuneo, Arthur A.M. Wilde, D. Woodrow Benson, Pascal Robles de Medina, Nico A. Blom, S. A. Clur, Mary T. Donofrio   +7 more
openaire   +3 more sources

Influence of heart rate on left ventricular isovolumic relaxation time: a Doppler study in healthy newborns

Journal of the American Society of Echocardiography, 2004
Left ventricular (LV) isovolumic relaxation time (LVIVRT) obtained by Doppler spectral analysis has emerged as a useful tool to assess diastolic function. 1,2 Correction for heart rate (HR) is an important advance for clinical application of LVIVRT, initially reported in healthy adult subjects by simultaneous phonocardiogram and echocardiogram.
Antonio De Merulis, Giulio Calcagni, Paolo Versacci, LUCCHINI, Renato, Flavia Ventriglia, MARINO TAUSSIG DE BODONIA, Bruno   +5 more
openaire   +4 more sources

Isovolumic Relaxation Time in Normal Subjects and Patients With Cardiac Disease: Comparison of Determinations Made With Echocardiographic Techniques and Apex Cardiography

Angiology, 1978
Isovolumic relaxation time (IVRT) was determined in 17 controls and 41 patients. Nine patients had ischemic heart disease (IHD), 7 mitral prolapse (MVPS), 13 hypertension (HPB), 7 pregnancy (P), and 5 cardiomyopathy (CM). Echocardiographic measurements of IVRT were made from the aortic second sound to the rapid opening of the mitral valve (A2D1 ...
Shirley Rubler, Matthew A. Araoye, Fred D. Holford   +2 more
openaire   +4 more sources

Right and left isovolumic ventricular relaxation time intervals compared in patients by means of a single-pulsed Doppler method

Journal of the American Society of Echocardiography, 1997
Right and left isovolumic ventricular relaxation time intervals measurements were obtained as follows: from the peak R wave on the electrocardiogram to either the mitral or the tricuspid pulsed Doppler flow trace onset minus the R to end-ejection zero flow crossing of the subaortic (left side) or pulmonary (right side) D flow trace time interval.
Denis Pellerin, Colette Veyrat, Claude Fournier, Fabrice Larrazet, Serge Witchitz   +4 more
openaire   +4 more sources

Systolic and diastolic time intervals in pulsus alternans

American Heart Journal, 1974
Systolic and diastolic time intervals in 14 cardiac patients with pulsus alternans revealed significant alternation of preinjection period (PEP), isovolumic contraction time (IVCT), left ventricular ejection time (LVET), ejection time index (ETI), PEP/LVET, and carotid dD/dt with better functional values in the strong beats.
David H. Spodick, David H. Spodick, Veronica M. Quarry, Veronica M. Quarry, Abdul H. Khan, Abdul H. Khan   +5 more
openaire   +4 more sources

Isovolumic Relaxation Time and Repolarization in Fetuses at Risk of Long QT Syndrome

JACC: Clinical Electrophysiology, 2023
Tan, Phan, Janette F, Strasburger, Ronald T, Wakai   +2 more
openaire   +3 more sources

Relation of Isovolumic Relaxation time to Left Ventricular End-Diastolic Pressure [PDF]

Clinical Science, 1981
M Mattheos, E Shapiro, Derek G. Gibson, P J Oldershaw   +3 more
openaire   +2 more sources

Functional infarct expansion, left ventricular dilation and isovolumic relaxation time after coronary occlusion: A two-dimensional echocardiographic study

Journal of the American College of Cardiology, 1988
Prabodh M. Mehta, Kevin J. Alker, Robert A. Kloner   +2 more
openalex   +2 more sources

Assessment of mitral A-wave transit time to cardiac outflow tract and isovolumic relaxation time of left ventricle in the appropriate and small-for-gestational-age human fetus

Ultrasound in Medicine and Biology, 1997
P. B. Tsyvian, K. Malkin, J. W. Wladimiroff   +2 more
openalex   +2 more sources