Intraventricular Pressure Differences
نویسندگان
چکیده
منابع مشابه
Intraventricular pressure differences: a new window into cardiac function.
Like all fluids, blood tends to flow from areas of high pressure to low pressure. This seemingly trite observation hides a great deal of sophisticated pathophysiology that we are only beginning to exploit diagnostically and potentially therapeutically. In this issue of Circulation, Yotti and colleagues have exploited a new noninvasive technique to measure the small pressure differences generate...
متن کاملMechanisms of diastolic intraventricular regional pressure differences and flow in the inflow and outflow tracts.
OBJECTIVES We sought to investigate the mechanisms of left ventricular (LV) intracavitary early diastolic flow during changes in contractility and loading. BACKGROUND There is limited understanding of how intracavitary flow velocities relate to intraventricular driving pressures. METHODS In 12 anesthetized dogs, we measured pressures in the left atrium (LA), LV at the mitral tip, apex, and ...
متن کاملClinical and laboratory findings in patients with nonobstructive intraventricular pressure differences.
SUMMARY Clinical and laboratorv findings were examined in eight patients with nonobstruc-tive intraventricular pressure differences resulting from catheter entrapment in obliterated apical portions of the left ventricular cavity. Cardiorespiratory symptoms were reported by six of the eight patients; three had angina pectoris, and two had experienced syncope. A soft systolic ejection murmur was ...
متن کاملNoninvasive assessment of ejection intraventricular pressure gradients.
OBJECTIVES The study was designed to validate in vivo a new method to measure ejection intraventricular pressure gradients (IVPGs) by processing color M-mode Doppler data and to assess the effects of inotropic interventions on IVPGs in the clinical setting. BACKGROUND In the absence of obstruction, ejection IVPGs cannot be estimated by Doppler using the simplified Bernoulli equation. METHOD...
متن کاملThe Harmonic Analysis of Intraventricular Pressure Curves
Investigators who have devised practical forms of manometers recording by optical registration have experienced considerable difficulty in selecting the constants so that an adequate natural frequency and a sufficient degree of sensitivity exist at the same time. Frank’s equation 2’ = M 1 2R ---y iE makes it clear why this is so. The natural period, T, is decreased by reducing the effective mas...
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ژورنال
عنوان ژورنال: Circulation
سال: 2005
ISSN: 0009-7322,1524-4539
DOI: 10.1161/circulationaha.105.566463