The cardiac cycle consists of one complete contraction (systole) and one complete relaxation (diastole), or one complete heartbeat. Atrial systole is... Learn more about this topic: Cardiac Cycle | Definition, Phases & Diagram from Chapter 13/ Lesson 8 ...
A spontaneously beating frog heart was automatically frozen at certain intervals after the R wave of the electrocardiogram. The determination of the SH groups in the ventricular myocardium was carried out during four periods of the cardiac cycle: at the onset of the muscular contraction; at the ...
Cardiac Model The heart chambers The contractile state of each chamber was modelled based on the time-varying elastance concept introduced by Sugaet al.42. The time-varying elastance describes the relation between chamber pressure,P(t), and chamber volume,V(t), during a cardiac cycle: $$P(t...
Cardiac cycle efficiency (CCE) is a novel parameter that is directly related to the cardiovascular impedance. Since the aortic valve contributes to impedance, we hypothesized during an aortic valvuloplasty, performed for severe aortic stenosis, the cardiovascular impedance may decrease by the reduction ...
Cardiac-cycle-time effects are attributed to variations in baroreceptor (BR) activity and have been shown to impinge on subcortical as well as cortical processes. However, cognitive and sensorimotor processes mediating voluntary responses seem to be differentially affected. We sought to disentangle cardi...
The case describes a complex case of RHT. Because the patient was ill-appearing with significant tachycardia and an abnormal shock index (HR 150 beats per minute/BP 101 mm Hg = 1.5, abnormal >1) upon arrival to the ED, FocUS was performed in this patient who manifested a ‘compensate...
The reservoir describes the filling of LA in ventricular systole. It is modulated by the LV contraction, RV systolic pressure, LA relaxation, and LA chamber stiffness. When blood flows to the LA from the pulmonary veins, the mitral valve is closed and LAV increases to maximum.Total Emptying ...
Heart rate turbulence describes the short-term fluctuation in sinus cycle length that follows a VPB (148). Although the mechanism of heart rate turbulence is not known with certainty, it has been postulated that it measures vagal responsiveness in a fashion similar to baroreflex sensitivity (BRS)...
The synchronized cardiac cycle images were normalized to one image sequence representing a complete cardiac cycle of blood flow in the ONH. A rectangular rubber band was manually set on the ONH region of interest. The same rubber band, at an identical position, was used for the subsequent ...
This report describes the frequency of per- sons with autosomal structural rearrangements of balanced type among F1 cohort, with special reference to the mutation rate on these abnormalities in Hiroshima. In this study, the number of parental couples, instead of the number of children, was used ...