Variables of regional and global LV function before and at 60 seconds of coronary occlusion
| Insufficient coronary collaterals | Sufficient coronary collaterals | ||||||
|---|---|---|---|---|---|---|---|
| Before | At 60 s | p Value (within group) | Before | At 60 s | p Value (within group) | p Value (between groups at occlusion) | |
| CTr, regional systolic contraction time; IVCTr, regional isovolumetric contraction time; IVRTr, regional isovolumetric relaxation time; LVEDP, left ventricular end diastolic pressure; VA, late diastolic excursion velocity; VE, early diastolic excursion velocity; V+IVCT, positive isovolumetric contraction velocity; V−IVCT, negative isovolumetric contraction velocity; V+IVRT, positive isovolumetric relaxation velocity; V−IVRT, negative isovolumetric relaxation velocity; VS, systolic excursion velocity | |||||||
| Heart rate (beats/min) | 71 (12) | 71 (12) | 70 (14) | 67 (13) | NS | ||
| Systolic LV function | |||||||
| V+IVCT (cm/s) | 7.7 (2.9) | 6.9 (2.5) | 0.04 | 9.8 (3.7) | 9.0 (2.7) | NS | 0.02 |
| V−IVCT (cm/s) | 6.6 (2.2) | 7.4 (3.6) | NS | 8.1 (3.4) | 7.4 (2.8) | NS | NS |
| IVCTr (ms) | 96 (44) | 102 (31) | NS | 92 (30) | 114 (46) | 0.009 | NS |
| VS (cm/s) | 7.4 (1.6) | 6.1 (1.8) | <0.0001 | 8.0 (1.6) | 7.4 (1.5) | NS | 0.02 |
| CTr (ms) | 284 (39) | 263 (48) | 0.01 | 265 (47) | 273 (37) | NS | NS |
| Diastolic LV function | |||||||
| LVEDP (mm Hg) | 14 (7) | 23 (9) | 0.0002 | 13 (5) | 18 (6) | NS | 0.03 |
| V+IVRT (cm/s) | 7.9 (8.5) | 6.4 (3.1) | NS | 8.3 (5.0) | 8.7 (4.2) | NS | NS |
| V−IVRT (cm/s) | 5.9 (2.4) | 5.5 (2.2) | NS | 7.5 (2.5) | 7.7 (3.3) | NS | 0.04 |
| IVRTr (ms) | 135 (42) | 148 (44) | 0.06 | 116 (34) | 124 (26) | NS | 0.04 |
| VE (cm/s) | 9.4 (3.1) | 8.1 (2.9) | 0.01 | 9.8 (2.6) | 10.0 (2.2) | NS | 0.02 |
| VA (cm/s) | 8.6 (3.4) | 8.6 (3.4) | NS | 9.7 (3.0) | 9.6 (3.9) | NS | NS |