Effect of reperfusion strategy on QT dispersion in patients with acute myocardial infarction: Impact on in-hospital arrhythmia

Table 2 Heart rate and QT interval before and after reperfusion, all patients

Parameter	Before reperfusion, n = 240 patients	After reperfusion, n = 240 patients	∆	P value
Heart rate in beat/min	78.6 ± 16.2	80.5 ± 15.7	-1.8 ± 16.9	0.09
Maximum QT in msec	407.1 ± 43.0	398.7 ± 45.2	8.5 ± 47.8	0.007
Minimum QT in msec	325.4 ± 41.7	341.3 ± 43.7	-15.9 ± 42.4	< 0.001
QTD in msec	81.8 ± 21.9	57.3 ± 18.9	24.4 ± 18.7	< 0.001
Maximum QTc in msec	461.2 ± 42.5	456.1 ± 38.9	5.1 ± 47.8	0.10
Minimum QTc in msec	368.5 ± 37.6	390.0 ± 36.4	-22.4 ± 44.5	< 0.001
QTcD in msec	92.7 ± 26.1	65.2 ± 22.6	27.5 ± 19.6	< 0.001

Data are expressed in form of mean ± SD. QTc: Corrected QT; QTD: QT dispersion; QTcD: Corrected QT dispersion; ∆: Delta is change in variables before and 24 hr after the reperfusion strategy.