Vectorcardiographic criteria for the diagnosis of left ventricular hypertrophy
| Autor: | Te-Chuan Chou, Charles W. Abbottsmith |
|---|---|
| Rok vydání: | 1970 |
| Předmět: |
Adult
Male medicine.medical_specialty Adolescent Aortic Valve Insufficiency Vectorcardiography Cardiomegaly Left ventricular hypertrophy Electrocardiography QRS complex Mitral valve stenosis Internal medicine medicine Humans Mitral Valve Stenosis cardiovascular diseases Aged Distal portion medicine.diagnostic_test business.industry Aortic Valve Stenosis Organ Size Middle Aged medicine.disease Autopsy series Aortic valve stenosis Hypertension cardiovascular system Cardiology Female Autopsy Cardiology and Cardiovascular Medicine business circulatory and respiratory physiology |
| Zdroj: | American Heart Journal. 79:361-369 |
| ISSN: | 0002-8703 |
| DOI: | 10.1016/0002-8703(70)90423-0 |
| Popis: | Increased voltage is only one of several electromotive changes that occur in left ventricular hypertrophy (LVH). The purpose of this study was to improve the vectorcardiographic diagnosis of LVH by defining criteria based on other QRS changes as well. They were determined by contrasting the VCG's of 200 normal subjects with those of 100 patients who had clinical evidence of pure LVH, and subsequently were tested on 100 consecutive autopsied cases. Voltage criteria were formed using the magnitude of the maximum QRS vector, while additional QRS criteria were developed using the following characteristics of the transverse plane QRS loop found in LVH: leftward displacement of the initial and terminal deflections; increased magnitude of posteriorly directed vectors; prolongation of the time of inscription of the maximum QRS vector; and enlargement of the distal portion of the QRS loop relative to the proximal portion. S-T and T criteria were also determined. When tested on the autopsy series, the 33.3 per cent recognition rate achieved with voltage criteria was increased to 50 per cent with the use of the additional QRS criteria, with no increase in the incidence of false positives. The additional QRS criteria were also shown to be useful in confirming the diagnosis of LVH made by voltage criteria. |
| Databáze: | OpenAIRE |
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