Echocardiography is the technique of using ultrasound waves to investigate and display the action of the heart as it beats. The waves are reflected to different degrees by different structures within the heart. The visual recording is called an echocardiogram.

The human heart  is a precision engine. With proper  maintenance, it will beat for an average of 76 years (4000 times an hour, 100,000 times a day, more than 2.7 billion times in the course of life. It costs of four chambers: two ventricles and two atria . Some big vessels departure from heart:: the aorta arises from left ventricle and spreads oxygenated blood to the body.

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