Cardiovascular System | Medical Library Online

Cardiovascular System

ECG waves
ECG waves

A normal recording of ECG shows P, QRS, and T waves. Sometimes a U wave is also recorded.In the recording strip of paper, there are horizontal and vertical.

Objectives of ECG
Objectives of ECG

Electrocardiogram (ECG) deals with the study of electrical activity of the heart. The instrument used to record the activity is called electrocardiograph..

Neural control of heart
Neural control of heart

The cardiac center, is situated in the medullary reticular formation in the dorsal motor nucleus and nucleus ambiguus, which give rise to vagus. The vagus.

I, II and III Heart Sounds
I, II and III Heart Sounds

The mechanical activity of the heart produces heart sounds. Sounds are produced due to vibrations caused by the closure of valves, contraction of the myocardium.

Capillary Circulation (Microcirculation)
Capillary Circulation (Microcirculation)

Capillaries are the exchange vessels, present between arterioles and venules. The arterioles in some places end in metarterioles, which in turn end in.

Cutaneous Circulation
Cutaneous Circulation

Blood flow through the skin is variable depending upon the body temperature regulation (flow ranges from 1 ml to 150 ml/100 gm/min.). The cutaneous blood.

Cerebral Circulation
Cerebral Circulation

Blood flow to the brain is supplied by cerebral arteries, which form the circle of Willis at the base of the brain. The venous drainage from the brain.

Phasic blood flow
Phasic blood flow

The blood flow in the left coronary artery is phasic in nature. The left ventricular pressure developed during systole is greater and hence the coronary.

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