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Diastole (/ d aɪ ˈ æ s t ə l i / dy-AST-ə-lee) is the relaxed phase of the cardiac cycle when the chambers of the heart are refilling with blood. The contrasting phase is systole when the heart chambers are contracting. Atrial diastole is the relaxing of the atria, and ventricular diastole the relaxing of the ventricles.
Diastole (at right) normally refers to atria and ventricles at relaxation and expansion together—while refilling with blood returning to the heart. Systole (left) typically refers to ventricular systole , during which the ventricles are pumping (or ejecting) blood out of the heart through the aorta and the pulmonary veins.
Ventricular relaxation, or diastole, follows repolarization of the ventricles and is represented by the T wave of the ECG. It too is divided into two distinct phases and lasts approximately 430 ms. [1] During the early phase of ventricular diastole, as the ventricular muscle relaxes, pressure on the remaining blood within the ventricle begins ...
High blood pressure (stage 1): 130-139 systolic or 80-89 diastolic High blood pressure (stage 2): 140-179 systolic or > 90 diastolic Hypertensive crisis: > 180 systolic, and/or > 120 diastolic
Cardiovascular physiology is the study of the cardiovascular system, specifically addressing the physiology of the heart ("cardio") and blood vessels ("vascular").. These subjects are sometimes addressed separately, under the names cardiac physiology and circulatory physiology.
It’s called the mean arterial pressure (MAP).” The American Heart Association (AHA) considers a systolic pressure below 120 and a diastolic pressure below 80 to be normal for adults.
The E/A ratio is a marker of the function of the left ventricle of the heart. It represents the ratio of peak velocity blood flow from left ventricular relaxation in early diastole (the E wave) to peak velocity flow in late diastole caused by atrial contraction (the A wave). [1]
Dr. Tadwalkar says people were told they were "pre-hypertensive" if their systolic blood pressure values were in the 120-129 range but their diastolic numbers remained under 80 mmHg.