Examlex
Which of the following is a characteristic that polar lows share with hurricanes?
Cardiac Cycle
The sequence of events that occur in a complete heartbeat, including diastole and systole phases.
Isovolumetric Relaxation
A phase in the cardiac cycle where the heart muscle relaxes but the volume of the ventricles does not change because all heart valves are closed.
SA Node
The sinoatrial node, a group of cells in the right atrium of the heart that sets the pace of the heartbeat.
P-R Interval
A measurement in electrocardiography representing the time between the onset of the P wave and the start of the QRS complex, related to atrial depolarization and AV nodal delay.
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