منابع مشابه
Electrical alternans vs. pseudoelectrical alternans
Beat-to-beat variations in QRS amplitude or axis may be caused by several conditions.
متن کاملParoxysmal Supraventricular Tachycardia with QRS Duration Alternans, Electrical Alternans, and Pulsus Alternans but without Cycle Length Alternans.
UNLABELLED We reported a 60-year-old male patient who had a paroxysmal supraventricular tachycardia with QRS duration alternans (alternation between narrow QRS and wide QRS beats) and electrical alternans, but without any cycle length alternans. In the laboratory, slow-fast atrioventricular nodal reentrant tachycardia was easily induced by an atrial extrastimulus, and the arterial pressure reco...
متن کاملBiventricular Pulsus Alternans
Pulsus alternans is a rare hemodynamic condition characterized by beat-to-beat variability in systolic pressure. It is attributed to variations in stroke volume with alternate cardiac cycles and is typically seen in patients with advanced myopathic conditions. Left ventricular pulsus alternans is rare, and right ventricular pulsus alternans is even less common. There are only a few reports of b...
متن کاملDobutamine-Induced Mechanical Alternans
We investigated the relationship between the occurrence of dobutamine-induced mechanical alternans (MA) and prognosis in ambulatory patients with idiopathic dilated cardiomyopathy (IDCM). Recent American College of Cardiology and American Heart Association guidelines for the management of heart failure have emphasized the need for earlier identification and therapy for patients at high risk of ...
متن کاملEchocardiography in Mechanical Alternans
We describe the echocardiographic manifestations of mechanical alternation of left ventricular (LV) contraction during regular sinus rhythm. Chronic LV dilatation and failure existed in all our four cases. Alternation was observed with respect to the following echocardiographic variables: amplitude and rate of increase of amplitude of systolic excursions of the LV posterior wall and ventricular...
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ژورنال
عنوان ژورنال: Archiv für Orthopädie, Mechanotherapie und Unfallchirurgie
سال: 1920
ISSN: 0003-9330,1434-3916
DOI: 10.1007/bf02597308