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Most adults need only 5 to 6 hours of sleep per night, provided it's high-quality sleep.
ECG Pattern
The visual representation of the electrical activity of the heart as recorded by an electrocardiogram.
P Wave
A deflection in the ECG representing the electrical activity of atrial depolarization, preceding the contraction of the atria.
P-Q Segment
The portion of an electrocardiogram (ECG) trace between the end of the P wave and the start of the QRS complex, indicative of the time electrical impulse travels from the atria to the ventricles.
Standard Leads
Predetermined positions on the body where electrodes are placed for the purpose of recording an electrocardiogram (ECG).
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