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Paroxysmal tachycardias are certainly caused by these substances, and the conditions of auricular fibrillation and auricular flutter may be found frequently present if such hearts are carefully examined with cardiographic instruments. The condition may be stopped by relieving the heart and circulation of all possible toxins and irritants, and by the administration of digitalis.
Besides mapping out the size of the heart by roentgenoscopy and studying the contractions of the heart with the fluoroscope, and a detailed study of sphygmographic and cardiographic tracings, which methods are not available to the large majority of physicians, there are various methods of approximately, at least, determining the strength of the heart muscle. Int.
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