Introduction: Coronary angiography is the examination of choice in the evaluation of coronary anatomy during acute myocardial infarction, particularly of the right ventricle (RV), whose diagnosis remains difficult. The electrocardiogram reflects the pathophysiology of myocardial ischemia, thus allowing prediction of the culprit lesion. Objective: To investigate the correlation between electrical and coronary data and to judge the reproducibility of the electrocardiogram in identifying the culprit lesion in RV infarction. Materials and Methods: Retrospective study of patients hospitalized in the Cardiology Department of the Mohammed VI University Hospital in Marrakech over a period of 24 months for MDI extended to the RV. Results: During the study period, 120 patients were hospitalized for MI with RV extension. Inferior MI represented 70% of all cases of infarction extended to the RV. It is represented electrically by isolated ST-segment elevation in V3R found in 76%, as well as in association with an elevation in V4R in 45% of cases. Conduction disorders were noted in 38% of cases, presented essentially by first degree atrioventricular block, without any electrical specificity. Coronary angiography was performed in 91% of patients, half of whom underwent coronary angioplasty. A bi-truncular involvement (RC + VIA) was found in 40% of cases, the middle DC is the culprit lesion in almost half of the cases of VD infarction.  The presence of an ST elevation in the isolated V3R shunt is a specific criterion of right middle coronary involvement, found in 48% of patients. Conclusion: The ECG remains an essential tool in the early prediction of the artery responsible for the infarction. Because of its complementary nature, the combination of ECG and coronary angiography is essential for a better evaluation of acute myocardial infarction.

Introduction: Coronary heart disease is the main cause of morbidity and mortality worldwide. Right ventricular (RV) infarction is often difficult to diagnose and has a poor prognosis due to rhythmic and hemodynamic complications. Objective: The study of electrical, ultrasonographic, and coronarographic features of the VD Infarction. Materials and Methods: Retrospective study of patients hospitalized in the Cardiology Department of the Mohammed VI University Hospital in Marrakech over a period of 24 months for MDI extended to the RV. Results: 120 patients were hospitalized during this period for MI with extension to the VD. Atypical clinical presentation was noted in 10% of cases. Clinical examination on admission revealed signs of right heart failure in 18% of cases, including 6% complicated by cardiogenic shock. Thrombolysis was performed in 10% of the patients, 67% of them successfully. The ECG found an isolated extension to the V3R leads in 76% of the cases and in association with a V4R overshoot in 45% of the cases, conduction disorders were noted in 28% of the cases, presented essentially by first degree auriculoventricular block. Echocardiography showed impaired LV function in 82% of cases, and longitudinal systolic dysfunction of the LV in 65%. Coronary angiography was performed in 91% of the cases, half of which underwent coronary angioplasty. The combination of both CD and IVA damage was found in 40% of the cases, and damage to the middle DC was the most common in almost half of the cases. The most frequent complications were rhythmic and conductive disorders in 38% of cases, and the evolution was fatal in 8% of cases. Conclusion: Involvement of the RV during MI is characterized by a very critical initial phase, once overcome, the overall prognosis becomes favorable in the long term.