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Location and Orientation of the Heart

Location and Orientation of the Heart

The human heart, despite its modest size and weight, is an organ of remarkable strength and endurance. Roughly the size of a fist, the heart weighs between 250 and 350 grams and is nestled within the mediastinum, the medial cavity of the thorax. It extends obliquely for about 12 to 14 cm, resting on the superior surface of the diaphragm. The heart is positioned anterior to the vertebral column and posterior to the sternum, with two-thirds of its mass lying to the left of the midsternal line.

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Related Experiment Video

Updated: Feb 23, 2026

Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine

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Mass in a pacemaker pocket

¹Department of Cardiology, Cardiovascular Hospital of Xiamen University, China, China. lq@lzu.edu.cn.

Kardiologia Polska

|September 13, 2017

Summary

No abstract available in PubMed .

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