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The purpose of the study in patients with coronary heart disease, heart function and pulmonary artery pressure (Pulmonary arterial pressure PAP), the relationship between the ECG indicators. The queue selected in October 2009 -2011 February 151 cases of Tianjin Medical University Hospital Cardiology hospitalized patients with coronary heart disease, according to the NYHA class is divided into group A (I, II level), group B (III level) C group (Ⅳ), PAP between the three groups were compared, the P-wave dispersion (P dispersion The Pd), QT between (QT), QT dispersion (QT dispersion, QTd), T crest - last interval The difference between (Tpeak-Tend, Tpe) and corrected QT (QTc), QTd (QTcd), Tpe (Tpec), and analyze of Pd and left atrial diameter (Left atrial diameter, LAD), QTd and left ventricular end-diastolic diameter (Left ventricular end diastolic diameter, LVEDD), the relationship between Pd and QTd. Results ① A group and B group, c patients Pd were 35.10 ± 10.99ms, 56.94 ± 9.18ms, 68.87 ± 8.63ms, the gap statistically significant (P lt; 0.05); the LAD were 38.55 ± 7.80mm, 45.20 ± 6.47mm, 48.48 ± 5.29mm, the gap was statistically significant (P lt; 0.05); Spearman rank correlation: Pd and LAD exists a positive correlation (r = 0.368, P lt; 0.05); ② A group, B group, c patients QT 423 ± 42ms, 448 ± 35ms, 473 ± 35ms, the gap was statistically significant (P lt; 0.05); QTc was 453 ± 30ms, 487 ± 17ms, 508 ± 27ms gap was significance (P lt; 0.05); QTd were 55 ± 13ms, 78 ± 15ms, 92 ± 15ms, the gap statistically significant (P lt; 0.05); QTcd were 59 ± 15ms, 90 ± 16ms, 101 ± 18ms the gap statistically significant (p lt; 0.05); LVEDD were 47.81 ± 6.26mm, 55.54 ± 6.10mm, 63.48 ± 7.63mm gap was statistically significant (P lt; 0.05); Spearman rank correlation results show: QTd and LVEDD existence is related (r = 0.602, p-lt; 0.05), QTcd and LVEDD was being related (r = 0.610, P lt; 0.05); ③ The A group, group B, patients with c group Tpe respectively for 85.59 ± 10.66ms, 99.00 ± 12.76ms, 112.39 ± 9.52ms, the gap was statistically significant (P lt; 0.05); Tpec were 96.20 ± 12.42ms, 106.67 ± 20.59ms, 120.77 ± 13.76ms, the gap was statistically significant (P lt; 0.05) ; ④ A group, B group, C group of patients with PAP were 23.88 ± 6.07mmHg, the 43.29 ± 13.47mmHg, of 51.56 ± 10.65mmHg gap was statistically significant (P lt; 0.05); display ⑤ correlation analysis: coronary heart disease Pd and QTd of patients there is a positive correlation (r = 0.698, P lt; 0.05). Conclusion ① patients with coronary artery disease with the deterioration of cardiac function, Pd increasing trend increase in the risk of atrial fibrillation; Pd and LAD was positively correlated; ② patients with coronary artery disease with the deterioration of cardiac function, QT, QTc, QTd, QTcd upward trend; increased risk of malignant arrhythmia; of QTd and QTcd and LVEDD was positively related; (3) in patients with coronary heart disease with the deterioration of cardiac function, Tpe Tpec increasing trend, an increased risk of malignant arrhythmias; ④ coronary heart disease patients with the deterioration of cardiac function, PAP elevated; ⑤ in patients with coronary heart disease Pd and QTd was positively correlated.
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