. Physical diagnosis . K^dJ^-NMj^-^U JUA? /uJU/V ^ A-V JUNCTION ^^. II III A-V JUNCTION Fig. 94.—(after Lewis). I. Occasional premature beats, (auricular extrasystoles) indicated in red. II. A short period of paroxysmal tachycardia, indicated in red. III. Absolute arrhythmia (auricular fibrillation). Lewis experiments indicate that these three disturbances represent three increasingdegrees of typical impulse-formation, all stages of one or the same process of disorderor civil war in the heart muscle. 118 PHYSICAL DIAGNOSIS cardia to the more serious auricular fibrillation just described andto
. Physical diagnosis . K^dJ^-NMj^-^U JUA? /uJU/V ^ A-V JUNCTION ^^. II III A-V JUNCTION Fig. 94.—(after Lewis). I. Occasional premature beats, (auricular extrasystoles) indicated in red. II. A short period of paroxysmal tachycardia, indicated in red. III. Absolute arrhythmia (auricular fibrillation). Lewis experiments indicate that these three disturbances represent three increasingdegrees of typical impulse-formation, all stages of one or the same process of disorderor civil war in the heart muscle. 118 PHYSICAL DIAGNOSIS cardia to the more serious auricular fibrillation just described andto the commoner and less serious form of arrhythmia next to bediscussed. Histologically nothing definite is known about the cause of par-oxysmal tachycardia. Premature Beats (Extrasystoles). i. Ventricular.—Except when the auricle is fibrillating, prematurebeats of -ventricular origin are rare; they occur occasionally in heartblock and in other conditions involving a tardy impulse fromthe auricle. The ventricle escapes with a spontaneous contrac-tion, as if impa
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdiagnos, bookyear1912
