Clinical characteristics of patients with heart failure with narrow and wide QRS complexes
| Narrow QRS (n=67) | Wide QRS (n=45) | χ2 | P value | |
|---|---|---|---|---|
| ACEI, angiotensin converting enzyme inhibitors. | ||||
| Age (years) | 65.7 (13.2) | 67.6 (10.4) | NS | |
| Male:female (%) | 73:27 | 78:22 | 0.31 | NS |
| QRS duration (ms) | 99 (11) | 155 (23) | <0.001 | |
| Causes of heart failure (%) | ||||
| Coronary artery disease | 70 | 54 | 6.23 | NS |
| Dilated cardiomyopathy | 21 | 40 | ||
| Hypertension | 6 | 4 | ||
| Valve disease | 1.5 | 0 | ||
| Alcoholic cardiomyopathy | 1.5 | 2 | ||
| Diabetes mellitus (%) | 33 | 39 | 0.41 | NS |
| Hypertension (%) | 50 | 42 | 0.50 | NS |
| Medications (%) | ||||
| ACEI | 72 | 71 | 0.01 | NS |
| Diuretics | 62 | 83 | 5.82 | 0.02 |
| Aspirin | 69 | 53 | 2.52 | NS |
| β Blockers | 30 | 34 | 0.14 | NS |
| Nitrates | 53 | 44 | 0.90 | NS |
| Calcium antagonists | 9 | 5 | 0.38 | NS |
| Digitalis | 16 | 19 | 0.21 | NS |
| Lipid lowering drugs | 35 | 21 | 2.37 | NS |