isovolumic relaxation
PREDICTION OF CORONARY ARTERY DISEASE BY DETECTION OF POSITIVE ISOVOLUMIC RELAXATION VELOCITY IN PATIENTS WITH NORMAL RESTING WALL MOTIONS "A Tissue Doppler Echocardiographic Study"
... iagnosis of coronary artery disease (CAD) is of importance in the cont-emporary society of ever-increasing CAD (1,2) . Exercise electrocardiography has found wide acceptance for CAD identification because of low cost. ...
8
CORONARY ARTERY DISEASE AND SEGMENTAL ISOVOLUMIC RELAXATION PATTERNS- WHAT IS THE RELATION?
... the isovolumic relaxation ...abnormal isovolumic relaxation velocities can add a value to predict presence of significant coronary artery ...the isovolumic relaxation velocities ...
6
Correlation of Annular MPI Ratio of Tissue Doppler Imaging (TDI) in Acute Inferior Wall Myocardial Infarction with Coronary Angiogram for identifying Culprit Vessel.
... Tissue Doppler imaging detects minor abnormalities in LV isovolumic relaxation and contraction, also longitudinal shortening in patients like chronic stable angina. For quantifying regional wall motion ...
97
Assessment of left ventricular diastolic function after Transcatheter aortic valve implantation in aortic stenosis patients by echocardiographic according to different guidelines
... annulus. Isovolumic relaxation time (IVRT) was assessed by placing PW spectral Doppler sample volume in LV outflow tract, displaying the curve and measuring the distances from the end of aortic outflow ...
10
Noninvasive assessment of pulmonary arterial capacitance by pulmonary annular motion velocity in children with ventricular septal defect
... ICT, Isovolumic contraction time; IRT, Isovolumic relaxation time; LVEDD, Left ventricular end-diastolic dimension; LVEF, Left ventricular ejection fraction; LVFS, Left ventricular fractional ...
12
Tissue Doppler echocardiographic quantification. Comparison to coronary angiography results in Acute Coronary Syndrome patients
... A qualitative approach based on visual assessment of myocardial wall motion has well-documented limitations and even with eyes of an expert may fail to identify subtle ischemia induced changes in regional myocardial ...
9
Statistical ranking of electromechanical dyssynchrony parameters for CRT
... IsovolCT, isovolumic contraction time; IsovolRT, isovolumic relaxation time; LLW, left lateral wall; LPEI, left pre-ejection interval; LVET, left ventricular ejection time; MVR, mitral valve ...
9
Vol 1, No 3 (2014)
... diastolic function of the lV and RV was assessed from filling velocities using spectral pulsed wave doppler technique with the sample volume positioned at the tips of the mitral and tricuspid valve leaflets, ...
5
Hemodynamic determinants of the time course of fall in canine left ventricular pressure
... in isovolumic left ventricular pressure were assessed in isolated canine left ventricular ...in isovolumic beats or during prolonged isovolumic diastole after ...in isovolumic ...
11
Assessment of the pressure–volume relationship of the single ventricle of the grass shrimp, Palaemonetes pugio
... ventricular relaxation begins with an isovolumic phase with all valves closed and a rapid drop in pressure toward ...This isovolumic relaxation phase in the ventricle of the grass shrimp ...
7
Assessment of Left Ventricular Function in Chronic Asymptomatic Alcoholics
... The end diastolic volume index, left ventricular mass index, posterior wall thickness, isovolumic relaxation time, deceleration time and peak late transmitral flow velocity demonstrated [r] ...
108
Direct and indirect effects of calcium entry blocking agents on isovolumic left ventricular relaxation in conscious dogs
... intravenous calcium entry blockade either produced no significant change (diltiazem and verapamil) or shortened (nifedipine T1 - 18%, P less than 0.01) LV isovolumic relaxation. However, after beta ...
10
Pharmacologic and Hemodynamic Influences on the Rate of Isovolumic Left Ventricular Relaxation in the Normal Conscious Dog
... catheters. Isoproterenol (11 studies) augmented peak rate of rise of left ventricular pressure [(+) dP/dt] by 1,275±227 (SE) mm Hg/s (P < 0.001) and dP/dt at an isopressure point of 35 mm Hg during isovolumic ...
12
Thermodynamic phase plane analysis of ventricular contraction and relaxation
... the isovolumic relaxation time constant, τ, for ventricular relaxation [17], end-diastolic pressure- volume relationship for passive left ventricular properties [26], conventional E-and A-wave ...
10
Thermally activated escape rate for the Brownian motion of a fixed axis rotator in an asymmetrical double well potential for all values of the dissipation
... As far as the verification of the universal turnover for- mula of Mel’nikov and Meshkov is concerned, very few cal- culations based on either the exact solutions of the Klein- Kramers equation or on numerical simulations ...
13
Diastolic dysfunction and altered energetics in the alphaMHC403/+ mouse model of familial hypertrophic cardiomyopathy
... lar relaxation during inotropic ...Impaired relaxation could be caused by a change in ventricular compliance, decreased rate of calcium resequestration into the sarcoplasmic reticulum, or prolonged ...
10
Intracellular calcium and ventricular function Effects of nisoldipine on global ischemia in the isovolumic, coronary perfused heart
... and relaxation during ischemia and reperfusion on a beat-to-beat ...Nine isovolumic coronary-perfused ferret hearts were made globally ischemic for 3 min and reperfused for 10 ...impaired. Relaxation ...
7
Air-Fluidized Grains as a Model System: Self-Propelling and Jamming
... relaxation time data for different systems such that, given temperature, pressure, and density,.. we know the relaxation time regardless of system specifications.[r] ...
141
Estimation of Vmax in auxotonic systoles from the rate of relative increase of isovolumic pressure: (dP/dt)kP
... (micromanometer) and its first derivative were used to calculate contractile element velocity (Vce) during the isovolumic period of auxotonic beats in anesthetized dogs. At 0.5-2.0 msec intervals of ...
11
Increased rat cardiac angiotensin converting enzyme activity and mRNA expression in pressure overload left ventricular hypertrophy Effects on coronary resistance, contractility, and relaxation
... significantly increased in the free wall, septum, and apex of the hypertrophied left ventricle, whereas ACE activity from the nonhypertrophied right ventricle of the aortic stenosis rats was not different from that of ...
9