Table 1.
Clinical presentation.
| Variable | Total N = 223 |
CFR ≤ 2 N = 91 |
CFR > 2 N = 117 |
p-Value | IMR ≥ 25 N = 84 |
IMR < 25 N = 121 |
p-Value |
|---|---|---|---|---|---|---|---|
| NYHA class | |||||||
| None | 105 (47.1) | 41 (45.1) | 51 (43.6) | 0.79 | 36 (42.9) | 54 (44.6) | 0.19 |
| I | 29 (13.0) | 10 (11.0) | 19 (16.2) | 7 (8.3) | 22 (18.2) | ||
| II | 63 (28.3) | 27 (29.7) | 34 (29.1) | 27 (32.1) | 33 (27.3) | ||
| III | 21 (9.4) | 11 (12.1) | 10 (8.5) | 12 (14.3) | 9 (7.4) | ||
| IV | 5 (2.2) | 2 (2.2) | 3 (2.6) | 2 (2.4) | 3 (2.5) | ||
| Shortness of breath | 81 (37.5) | 44 (48.4) | 35 (29.9) | 0.01 | 37 (44.0) | 41 (33.9) | 0.14 |
| Chest pain | 148 (68.5) | 70 (76.9) | 71 (61.7) | 0.02 | 64 (77.1) | 75 (62.5) | 0.03 |
| Palpitation/arrhythmia | 34 (15.7) | 16 (17.6) | 17 (14.5) | 0.55 | 19 (22.6) | 13 (10.7) | 0.02 |
| Syncope | 6 (2.8) | 2 (2.2) | 4 (3.4) | 0.47 | 2 (2.4) | 4 (3.3) | 0.52 |
| Prior cardiac arrest | 5 (2.4) | 1 (1.1) | 4 (3.5) | 0.27 | 2 (2.4) | 3 (2.5) | 0.67 |
| CCS class | |||||||
| None | 61 (27.4) | 24 (26.4) | 30 (25.6) | 0.20 | 15 (17.9) | 38 (31.4) | 0.03 |
| I | 30 (13.5) | 8 (8.8) | 21 (17.9) | 8 (9.5) | 21 (17.4) | ||
| II | 94 (42.2) | 39 (42.9) | 50 (42.7) | 44 (52.4) | 43 (35.5) | ||
| III | 37 (16.6) | 19 (20.9) | 16 (13.7) | 17 (20.2) | 18 (14.9) | ||
| IV | 1 (0.5) | 1 (1.1) | 0 (0.0) | 0 (0.0) | 1 (0.8) | ||
| Stable angina symptomatic | 100 (44.8) | 43 (47.3) | 52 (44.4) | 0.69 | 44 (52.4) | 50 (41.3) | 0.12 |
| Unstable angina symptomatic | 36 (16.1) | 20 (22.0) | 14 (12.0) | 0.052 | 17 (20.2) | 67 (79.8) | 0.24 |
Data are presented as counts (percentages). CCS: Canadian Cardiovascular Society; CFR: coronary flow reserve; IMR: index of microcirculatory resistance; NYHA: New York Heart Association.