Table 4.
Left ventricular functional characteristics assessed by echocardiography
| Parameter | COPD (n=49) | Controls (n=36) | P-value |
|---|---|---|---|
| FS (%) | 40±12 | 42±6 | ns |
| EF (%) | 69±6 | 68±7 | ns |
| SV (mL) | 61±17 | 69±11 | <0.05 |
| Mitral E pv (cm/s) | 53.6±13.6 | 58.3±13.2 | ns |
| Mitral E tvi (cm) | 8.8±2.6 | 10.2±2.0 | <0.05 |
| Mitral A pv (cm/s) | 69.8±12.3 | 67.1±11.8 | ns |
| Mitral A tvi (cm) | 8.4±1.9 | 8.4±2.5 | ns |
| Mitral E/A pv (cm/s) | 0.8±0.2 | 0.9±0.1 | ns |
| Mitral E/A tvi (cm) | 1.1±0.3 | 1.3±0.4 | <0.01 |
| DTE S pv (cm/s) | 10.7±2.2 | 10.6±2.1 | ns |
| DTE S tvi (cm) | 2.1±0.8 | 2.1±0.4 | ns |
| DTE E′ pv (cm/s) | 10.0±2.6 | 9.8±2.4 | ns |
| DTE E′ tvi (cm) | 1.1±0.3 | 1.1±0.4 | ns |
| DTE A′ pv (cm/s) | 13.9±3.1 | 13.9±2.6 | ns |
| DTE A′ tvi (cm) | 1.2±0.3 | 1.2±0.3 | ns |
| DTE E′/A′ pv | 0.9±0.9 | 0.8±0.3 | ns |
| DTE E′/A′ tvi | 0.9±0.3 | 0.9±0.4 | ns |
Notes: Data mean ± standard deviation. Values from DTE analysis are the mean of septal and lateral walls.
Abbreviations: A′, end-diastolic myocardial wave; DTE, Doppler tissue echocardiography; E′, proto-diastolic myocardial wave; EF, ejection fraction; FS, fraction of shortening; pv, peak velocity; S, systolic myocardial wave; SV, stroke volume; tvi, time velocity integral.