Shift workers make great use of health care services because they are associated with increased cardiovascular morbidity and mortality. Whether the circadian rhythm of blood pressure rapidly adapts to ...

The ECG shows regular P waves at 60 beats per minute (bpm) with no conduction to the ventricles. The ventricular rate is about 70 bpm with QRS duration of 0.20 and a left bundle branch block (LBBB) ...

This ECG meets two criteria for ventricular tachycardia. AV dissociation appears to be present. Examine the rhythm strip in lead V1 and intermittently a P wave will correspond just prior to the QRS ...

Your circadian rhythm is your body’s internal clock. Light, sleep patterns, hormones, meals, and temperature can all influence your circadian rhythm, which in turn can influence your overall health.

Circadian rhythms are cycles in the body that occur roughly across 24 hours. In humans, circadian rhythms cause physical and mental changes in the body, including feelings of wakefulness and sleep.