Baseline characteristics of the seven study patients and mean (SD) values of measured and calculated independent variables determining left ventricular ejection fraction over 500 consecutive cycles, arranged by ejection fraction
| Patient 1 | Patient 2 | Patient 3 | Patient 4 | Patient 5 | Patient 6 | Patient 7 | |
|---|---|---|---|---|---|---|---|
| Sex | M | F | M | M | M | M | M |
| Age (years) | 64 | 67 | 36 | 61 | 61 | 42 | 45 |
| Underlying heart disease | IHD | RHD | Lone | Lone | IHD | DCM | Lone |
| Arrhythmia duration (months) | 2 | 168 | 4 | 6 | 56 | 1.5 | 10 |
| LA diameter, long axis view (mm) | – | 47 | 41 | 45 | 50 | 52 | – |
| LV end diastolic diameter (mm) | 55 | 45 | 50 | 51 | 55 | 70 | 40 |
| LV end systolic diameter (mm) | 42 | 29 | 38 | 38 | 37 | 58 | 30 |
| Mean RR interval (ms) | 427 (138) | 610 (131) | 589 (134) | 776 (259) | 632 (147) | 885 (302) | 729 (137) |
| Range | 180 to 930 | 410 to 1150 | 180 to 1210 | 170 to 1670 | 330 to 1160 | 330 to 1880 | 510 to 1250 |
| Mean LV ejection fraction (%) | 25 (15) | 30 (9) | 31 (12) | 38 (12) | 41 (8) | 42 (10) | 46 ( 7) |
| Range | 1 to 71 | 7 to 54 | 3 to 61 | 2 to 62 | 8 to 60 | 2 to 67 | 31 to 63 |
| Mean LV end diastolic volume (ml) | 136 (36) | 215 (33) | 142 (24) | 211 (40) | 136 (17) | 180 (27) | 184 (21) |
| Range | 52 to 230 | 152 to 335 | 76 to 190 | 112 to 314 | 67 to 164 | 82 to 231 | 125 to 228 |
| Mean LV end systolic volume (ml) | 99 (25) | 148 (20) | 97 (18) | 129 (23) | 80 (7) | 105 (24) | 98 (14) |
| Range | 41 to 178 | 111 to 221 | 57 to 137 | 73 to 226 | 53 to 98 | 52 to 162 | 76 to 144 |
| Pulmonary wedge pressure (mm Hg) | 21 (5) | 22 (3) | 18 (2) | 9 (2) | 24 (6) | 9 (3) | 9 (2) |
| Range | 10 to 35 | 17 to 27 | 13 to 28 | 4 to 33 | 3 to 38 | 4 to 30 | 4 to 17 |
| Mean LV contractility (mm Hg/ml) | 1.2 (0.4) | 1.0 (0.2) | 1.1 (0.2) | 1.3 (0.3) | 1.2 (0.01) | 1.2 (0.4) | 1.5 (0.2) |
| Range | 0.2 to 3.1 | 0.7 to 1.5 | 0.7 to 1.9 | 0.7 to 2.4 | 1.17 to 1.21 | 0.2 to 2.8 | 1.0 to 3.2 |
| Mean LV afterload (mm Hg/ml) | 7.3 (12.7) | 2.9 (2.6) | 3.6 (4.3) | 3.2 (5.1) | 1.9 (1.0) | 1.8 (1.7) | 1.8 (0.4) |
| Range | 0.5 to 114.9 | 1.3 to 25.0 | 1.1 to 41.6 | 1.0 to 52.1 | 0.8 to 13.8 | 0.5 to 26.6 | 1.0 to 2.0 |
DCM, dilated cardiomyopathy; IHD, ischaemic heart disease; LA, left atrial; lone, “lone” arrhythmia; LV, left ventricular; RHD, rheumatic heart disease.