Muhammad Imran Aslam, Muhammad Nawaz Anjum, Nauman Bashir Barlas.
Radiographic heart size and Cardiothoracic ratio in different age groups in adult Pakistani population.
Pak Postgrad Med J Jan ;11(4):142-4.

Heart sizes and cardiothoracic ratios were assessed on chest x-ray PA view. Two thousand subjects, without any cardiac or respiratory complaints were included in this study. Their skiagrams were obtained either for pre employment assessment or pre anesthetic evaluation. Study was conducted at Services hospital Lahore. The heart sizes varied from 11 to 16 cm and cardiothoracic ratio ranged from 41 to 59% in healthy adult population. Increased cardiothoracic ratio was observed in elderly people, it was not due to increased heart size but due to indrawing of rib cage in old age height and weight had no significant effect on cardiothoracic ratio.

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