Unlabelled: Myocardial infarction (MI) of the right ventricle (RV) coexists in 20- 60% of patients with inferior MI. There are electrocardiographic indicators which are connected with RV MI, which may also predict unfavorable clinical outcome of in-hospital follow-up.
Aim: The aim of the study was determination a value of seven electrocardiographic predictors of RV MI in prognosis of in-hospital complications in patients with inferior MI.
Materials And Methods: The analysis of hospital files of patients admitted with diagnosis of inferior MI with persistent ST elevation (STEMI) was retrospectively performed. A set of seven RV MI predictors (RVMIP) was assessed from the electrocardiographic tracings (ECG). Finally in group of 167 patients relation between each RVMIP and in-hospital complications was statistically evaluated.
Results: The most often RVMIP was an elevation of ST higher in III lead then in II and aVF (RVMIP-2; recorded in 61,7% patients). In total any RVMIP was found in ECG of 142 patients (85%). Patients who had more RVMIP were more prone for combined adverse cardiac event (CACE, which included artificial respirotherapy, lungs edema and cardiogenic shock) (p=0,012); ventricular arrhythmias (p<0,001) and second/third grade atrioventricular blocks (p=0,028). Advanced atrioventricular blocks were more often observed in patient with ST elevation in V1 and ST depression in aVL (OR=4,91, p=0,005; OR=4,67, p=0,006; respectively). On the other hand second/third grade atrioventricular blocks were also related to higher incidence of CACE, ventricular arrhythmias and atrial fibrillation (AF), respectively: OR=8,1, p<0,001; OR=7,19, p=0,001; OR=5,75, p=0,001).
Conclusions: The more RVMIPs the higher risk of in-hospital complication in patients with inferior MI. The second/third grade atrioventricular blocks were recorded more often in patients with ST elevation in V1 and ST depression in aVL. Advanced atrioventricular conduction blocks were related to worse outcome of in-hospital followup. A detailed ECG analysis in admission still adds important contribution in determination of in-hospital risk of complications.
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