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  2. 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.

  3. Premature ventricular contraction - Wikipedia

    en.wikipedia.org/wiki/Premature_ventricular...

    PVCs may be found incidentally on cardiac tests such as a 12-lead electrocardiogram (ECG/EKG) performed for another reason. In those with symptoms suggestive of premature ventricular complexes, the ECG/EKG is the first investigation that may identify PVCs as well as other cardiac rhythm issues that may cause similar symptoms.

  4. Labile hypertension - Wikipedia

    en.wikipedia.org/wiki/Labile_hypertension

    Electrocardiogram (EKG or ECG): A clinical test to measure and record electrical conductivity of the heart. It helps determine defects of heart electrical activity, rhythm and rate to help assist in diagnosis of heart defects that may affect in heart rhythm such as tachycardia and coronary artery blood flow (e.g. ischemia ).

  5. Electrocardiography - Wikipedia

    en.wikipedia.org/wiki/Electrocardiography

    Electrocardiography is the process of producing an electrocardiogram (ECG or EKG [a]), a recording of the heart's electrical activity through repeated cardiac cycles. [4] It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart [ 5 ] using electrodes placed on the skin.

  6. T wave - Wikipedia

    en.wikipedia.org/wiki/T_wave

    This causes the repolarization to occur more slowly, making the refractory period as long as the action potential, preventing sustained contractions. The T wave is representative of the repolarization of the membrane. In an EKG reading, the T wave is notable because it must be present before the next depolarization.

  7. Bigeminy - Wikipedia

    en.wikipedia.org/wiki/Bigeminy

    Bigeminy is a cardiac arrhythmia in which there is a single ectopic beat, or irregular heartbeat, following each regular heartbeat.Most often this is due to ectopic beats occurring so frequently that there is one after each sinus beat, or normal heartbeat.

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  9. QT interval - Wikipedia

    en.wikipedia.org/wiki/QT_interval

    The QT interval is a measurement made on an electrocardiogram used to assess some of the electrical properties of the heart.It is calculated as the time from the start of the Q wave to the end of the T wave, and approximates to the time taken from when the cardiac ventricles start to contract to when they finish relaxing.

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