Vectorcardiographic detection of early hemodynamic abnormalities in chronic obstructive pulmonary disease
| Autor: | John R. Wilson, Edward H. Chester, Gerald L. Baum, John J. Picken, Robert C. Bahler, Ulysses G. Mason |
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| Rok vydání: | 1979 |
| Předmět: |
Pulmonary and Respiratory Medicine
Adult medicine.medical_specialty Pulmonary Circulation Supine position Time Factors Vectorcardiography Hemodynamics Pulmonary disease Critical Care and Intensive Care Medicine QRS complex Right ventricular hypertrophy Internal medicine Medicine Humans In patient Lung Diseases Obstructive Lung Aged COPD business.industry Middle Aged medicine.disease Cardiovascular Diseases Circulatory system Cardiology Cardiology and Cardiovascular Medicine business |
| Zdroj: | Chest. 76(2) |
| ISSN: | 0012-3692 |
| Popis: | The ability of the vectorcardiogram to detect mild circulatory abnormalities in patients with chronic obstructive pulmonary disease (COPD) is unclear. Therefore, vectorcardiographic changes were correlated with hemodynamic measurements made at rest and during supine exercise in 32 patients with COPD and no clinical or electrocardiographic evidence of right ventricular hypertrophy. Twelve patients had normal hemodynamic data (group 1), nine had abnormal hemodynamic data only during exercise (group 2), and 11 had abnormal hemodynamic data at rest and during exercise (group 3). The extent of rightward terminal QRS forces noted on the vectorcardiogram was significantly less in group 1 (5.5 +/- 8.7 percent) than in either group 2 (19.0 +/- 10.7 percent) or group 3 (17.8 +/- 14.8 percent). Sixty-five percent (13) of the 20 patients with hemodynamic abnormalities had rightward terminal QRS forces of 15 percent or more, whereas only 8 percent (one) of the 12 patients with normal hemodynamic data had such forces of 15 percent or more. The mean of the rightward terminal QRS forces in 27 age-matched normal subjects was 5.0 +/- 5.4 percent, and only one subject had forces of 15 percent or more. We conclude that hemodynamic abnormalities are frequent in patients with COPD and no clinical evidence of right ventricular hypertrophy and that the vectorcardiogram provides an indirect method of detecting these abnormalities. |
| Databáze: | OpenAIRE |
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