Overall n=612 | Survivors n=566 (92%) | Cardiac deaths n=25 (4.1%) | p Value (vs survivors) | Non-cardiac deaths n=21 (3.4%) | p Value (vs survivors) | |
QTmax (ms) | ||||||
Baseline | 425±35 | 425±35 | 426±38 | NS | 429±26 | NS |
6 h after PCI | 417±38** | 417±38 | 426±41 | NS | 418±36 | NS |
18 h after PCI | 419±34* | 419±34 | 427±39 | NS | 421±32 | NS |
QTmin (ms) | ||||||
Baseline | 371±32 | 371±32 | 368±35 | NS | 374±30 | NS |
6 h after PCI | 369±35 | 370±35 | 359±34 | NS | 371±37 | NS |
18 h after PCI | 371±32 | 371±31 | 364±38 | NS | 378±30 | NS |
HR (bpm) | ||||||
Baseline | 62±10 | 62±10 | 67±15 | NS | 62±11 | NS |
6 h after PCI | 65±12* | 65±12 | 71±15 | NS | 66±12 | NS |
18 h after PCI | 65±11* | 65±10 | 70±11 | NS | 65±11 | NS |
ΔHR | ||||||
Baseline—6 h after PCI | 3±12 | 3±11 | 4±9 | NS | 4±7 | NS |
Baseline—18 h after PCI | 3±11 | 3±10 | 3±9 | NS | 3±6 | NS |
RR (ms) | ||||||
Baseline | 1003±165 | 1006±164 | 938±174 | NS | 1002±177 | NS |
6 h after PCI | 960±307** | 965±316 | 878±144 | NS | 941±161 | NS |
18 h after PCI | 948±147*** | 951±147 | 881±129 | NS | 946±155 | NS |
cQTmax (ms) | ||||||
Baseline | 428±50 | 427±51 | 443±34 | NS | 432±28 | NS |
6 h after PCI | 431±36 | 430±36 | 457±34 | 0.001 | 433±27 | NS |
18 h after PCI | 433±35 | 432±34 | 457±35 | 0.001 | 436±35 | NS |
cQTmin (ms) | ||||||
Baseline | 374±45 | 373±46 | 383±36 | NS | 376±24 | NS |
6 h after PCI | 382±32** | 381±32 | 386±33 | NS | 385±27 | NS |
18 h after PCI | 383±31*** | 383±30 | 389±37 | NS | 391±27 | NS |
QTD (ms) | ||||||
Baseline | 54±25 | 54±25 | 58±26 | NS | 54±24 | NS |
6 h after PCI | 48±26*** | 47±26 | 66±27 | 0.001 | 47±26 | NS |
18 h after PCI | 49±25** | 48±25 | 63±29 | 0.011 | 43±26 | NS |
cQTD (ms) | ||||||
Baseline | 54±26 | 54±26 | 60±26 | NS | 55±26 | NS |
6 h after PCI | 50±27** | 49±27 | 71±27 | 0.0001 | 49±28 | NS |
18 h after PCI | 50±27* | 50±26 | 67±31 | 0.004 | 45±28 | NS |
∆cQTD (ms) | ||||||
Baseline—6 h after PCI | 5±27 | 5±27 | −11±26 | 0.007 | 7±25 | NS |
Baseline—18 h after PCI | 4±29 | 4±29 | −8±35 | NS | 11±21 | NS |
All the following p values are for trend versus baseline: *p<0.05; **p<0.01; ***p<0.001.
cQTD, corrected QT dispersion; ∆cQTD, modification of cQTD as compared with baseline value; cQTmax, corrected QTmax (with a modification of the Bazett's formula8); cQTmin, corrected8 QTmin; HR, heart rate; PCI, percutaneous coronary intervention; QTD, QT interval dispersion; QTmax, maximum QT interval; QTmin, minimum QT interval; RR, R–R interval.