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Weight of the heart

280–340 g in males.230–280 g in females.

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ROTATION

The heart rotates 45 degrees during development.

Two thirds of RA and RV face anteriorly.

Two thirds of LV and most of LA face posteriorly.

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LA

Lies behind the RA. Hidden by the ascending aorta

and pulmonary trunk. X-ray chest

Small part of the left appendage forms part of the left heart border.

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Anterior surface

RV - forms most of the anterior aspect.

Most of the left heart is posterior.

Covered in front by the right heart.

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Base of the heart

Upper border of the heart Great vessels are attached.

LA Forms most of the base of the heart.

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Posterior aspect of the heart Left atrium - forms most of the posterior aspect

of the heart. Enlarged LA

May compress the esophagus Produce dysphagia

Thrombi in the LA Transesophageal echocardiography.

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