"The time to treat heart failure is before it happens." These words, used by Abraham Jacobi in a discussion on the treatment of diphtheria nearly twenty years ago, impressed me forcibly. The maxim applies equally to pneumonia.
From what sources does the danger of heart failure in pneumonia threaten? Its causes are many and their interaction may be complex. There are three principal causes and many secondary ones. The principal causes are, first, the toxemia; second, the mechanical obstruction to the circulation in the lung, causing overburdening and dilatation, especially of the right heart; third, the alteration in the physical and chemical constitution of the blood which, apart from the toxic effect on nervous and muscular action, central and cardiac, predisposes to the formation of antemortem clot. Among the most important of rare causes are hyperpyrexia and a sudden paralysis of inexplicable origin.
The old name "lung fever"
SOLIS-COHEN S. THE PREVENTION AND TREATMENT OF HEART FAILURE IN PNEUMONIA.. JAMA. 1904;XLIII(24):1771–1776. doi:10.1001/jama.1904.92500240002i
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