Table 4. Association of ECG parameters to pericardial effusion and LVEF.
| Factor | Pericardial Effusion | LVEF<40% | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| ECG Factor Absent | ECG Factor Present | Sensitivity | Specificity | p | ECG Factor Absent | ECG Factor Present | Sensitivity | Specificity | p | |
| Abnormal ECG | 27 (21) | 130 (28) | 83 (76–88) | 24 (20–28) | 0.081 | 15 (12) | 174 (38) | 92 (87–95) | 29 (25–33) | <0.001* |
| Wide QRS-T Angle (≥90°) | 100 (22) | 57 (43) | 36 (29–44) | 82 (78–86) | <0.001* | 106 (24) | 81 (61) | 43 (36–50) | 88 (83–90) | <0.001* |
| Low Voltage | 134 (25) | 22 (43 | 14 (9–20) | 93 (90–95) | 0.005* | 164 (31) | 24 (47) | 13 (7–18) | 94 (91–96) | 0.017* |
| fQRS | 122 (28) | 31 (23) | 20 (14–27) | 76 (72–80) | 0.327 | 147 (33) | 37 (28) | 20 (15–26) | 75 (71–80) | 0.234 |
| Q-wave | 127 (25) | 29 (38) | 18 (13–25) | 89 (86–91) | 0.019* | 149 (29) | 40 (52) | 21 (16–28) | 91 (87–93) | <0.001* |
| T-wave | 90 (22) | 66 (38) | 42 (35–50) | 75 (70–78) | <0.001* | 119 (29) | 69 (39) | 37 (30–44) | 73 (69–77) | 0.014* |
| PR Duration (≥200ms) | 136 (27) | 7 (16) | 5 (2–10) | 91 (88–93) | 0.116 | 149 (30) | 14 (33) | 9 (5–14) | 92 (89–95) | 0.718 |
| QRS Duration (≥120ms) | 126 (26) | 31 (31) | 20 (14–27) | 84 (80–87) | 0.260 | 132 (27) | 57 (58) | 30 (24–37) | 89 (86–92) | <0.001* |
| QTc Duration (≥470ms for females, ≥450ms for males) | 90 (23) | 67 (34) | 42 (35–51) | 69 (65–74) | 0.001* | 74 (19) | 115 (58) | 61 (54–68) | 79 (75–83) | <0.001* |
Frequency and (%), along with sensitivity and specificity and 95% confidence are shown for the number of patients who were categorically classified with pericardial effusion and with left ventricular ejection fraction (LVEF) below 40% based on the absence or presence of ECG parameters. ECG: Electrocardiogram, fQRS: Fragmented QRS.
*p<0.05 denotes a significant relationship.