Electrical alternans and cardiac electrical instability.
نویسندگان
چکیده
منابع مشابه
Electrical alternans and cardiac electrical instability.
We investigated the relationship between electrical alternans and cardiac electrical stability in a series of 20 dog experiments and in a pilot clinical study. Electrical alternans was detected in both the QRS complex and the ST-T wave by use of a novel multidimensional spectral technique. The magnitude of the alteration was expressed as the alternating electrocardiographic morphology index (AE...
متن کاملDIAGNOSTIC METHODS VENTRICULARA Electrical alternans and cardiac electrical instability
We investigated the relationship between electrical alternans and cardiac electrical stability in a series of 20 dog experiments and in a pilot clinical study. Electrical alternans was detected in both the QRS complex and the ST-T wave by use of a novel multidimensional spectral technique. The magnitude of the alternation was expressed as the alternating electrocardiographic morphology index (A...
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Of nine patients with pericardial effusion due to various causes, four developed cardiac tamponade. Electrical alternans was present in all four, being total in three and ventricular in one. The alternans corresponded very well with the clinical diagnosis of cardiac tamponade and the radiological signs of a large pericardial effusion. In two patients alternans was present even with heart rates ...
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Beat-to-beat variations in QRS amplitude or axis may be caused by several conditions.
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DESCRIPTION A 39-year-old woman with several weeks’ history of malaise and shortness of breath was referred because of acute deterioration. Examination revealed a regular tachycardia of 110 bpm, evidence of pulsus alternans and a blood pressure of 120/74, but was otherwise unremarkable. A routine admission 12-lead ECG (figure 1) demonstrated low voltage QRS alternans. As a result of this findin...
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ژورنال
عنوان ژورنال: Circulation
سال: 1988
ISSN: 0009-7322,1524-4539
DOI: 10.1161/01.cir.77.1.110