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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.
Electrical waves track a systole (a contraction) of the heart. The end-point of the P wave depolarization is the start-point of the atrial stage of systole. The ventricular stage of systole begins at the R peak of the QRS wave complex; the T wave indicates the end of ventricular contraction, after which ventricular relaxation (ventricular diastole) begins.
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.
The first heart sound S1, is the sound created by the closing of the atrioventricular valves during ventricular contraction and is normally described as "lub". The second heart sound, S2, is the sound of the semilunar valves closing during ventricular diastole and is described as "dub". [1]
Hypertension is classified into stages of severity; Stage 1 has a systolic reading of 130 to 139 or a diastolic reading of 80 to 89. A systolic measurement above 180 and/or a diastolic measurement ...
The reason the third heart sound does not occur until the middle third of diastole is probably that during the early part of diastole, the ventricles are not filled sufficiently to create enough tension for reverberation. [1] It may also be a result of tensing of the chordae tendineae during rapid filling and expansion of the ventricle.
If systolic blood pressure is elevated (>140 mmHg) with a normal diastolic blood pressure (<90 mmHg), it is called isolated systolic hypertension and may present a health concern. [ 49 ] [ 56 ] According to the 2017 [ 57 ] American Heart Association blood pressure guidelines state that a systolic blood pressure of 130–139 mmHg with a ...
High blood pressure (hypertension, which is when the systolic pressure is between 130 and 139 or diastolic pressure is between 80 and 89) can raise the risk of heart attack and stroke if left ...
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related to: heart systole and diastole- 262 Neil Avenue # 430, Columbus, Ohio · Directions · (614) 221-7464
