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  2. Cardiac cycle - Wikipedia

    en.wikipedia.org/wiki/Cardiac_cycle

    At this point, the atrial systole applies contraction pressure to 'topping-off' the blood volumes sent to both ventricles; this atrial contraction closes the diastole immediately before the heart again begins contracting and ejecting blood from the ventricles (ventricular systole) to the aorta and arteries.

  3. Systole - Wikipedia

    en.wikipedia.org/wiki/Systole

    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.

  4. Diastole - Wikipedia

    en.wikipedia.org/wiki/Diastole

    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.

  5. Hypertension is a ‘silent killer.’ Here’s what your blood ...

    www.aol.com/finance/hypertension-silent-killer...

    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 ...

  6. Blood pressure - Wikipedia

    en.wikipedia.org/wiki/Blood_pressure

    The difference between the systolic and diastolic pressures is known as pulse pressure, [1] while the average pressure during a cardiac cycle is known as mean arterial pressure. [ 2 ] Blood pressure is one of the vital signs —together with respiratory rate , heart rate , oxygen saturation , and body temperature —that healthcare ...

  7. Pulse pressure - Wikipedia

    en.wikipedia.org/wiki/Pulse_pressure

    Pulse pressure is calculated as the difference between the systolic blood pressure and the diastolic blood pressure. [3] [4]The systemic pulse pressure is approximately proportional to stroke volume, or the amount of blood ejected from the left ventricle during systole (pump action) and inversely proportional to the compliance (similar to elasticity) of the aorta.

  8. Cardiac physiology - Wikipedia

    en.wikipedia.org/wiki/Cardiac_physiology

    The period of relaxation that occurs as the chambers fill with blood is called diastole. Both the atria and ventricles undergo systole and diastole, and it is essential that these components be carefully regulated and coordinated to ensure blood is pumped efficiently to the body. [1] The cardiac cycle as correlated to the ECG

  9. Vital signs - Wikipedia

    en.wikipedia.org/wiki/Vital_signs

    The difference between the systolic and diastolic pressure is called the pulse pressure. The measurement of these pressures is now usually done with an aneroid or electronic sphygmomanometer . The classic measurement device is a mercury sphygmomanometer, using a column of mercury measured off in millimeters .