Key result
Inferior AMI with concurrent RVMI links to higher RAVI and RAP versus isolated inferior AMI.
Why the study?
Right ventricular involvement is common in inferior infarction, but echocardiographic assessment of right atrial function in inferior wall acute myocardial infarction compared with non-IHD controls required evaluation.
Cross-Sectional (n=200)
No
Right atrial volume index and pressure are significantly elevated in patients with inferior wall myocardial infarction who have concurrent right ventricular involvement, but not in isolated inferior wall MI.
RA function assessment in IWMI may aid risk stratification; leaves open whether it improves outcomes or guides therapy.
Background: Approximately 30–50% of patients with inferior infarction have some involvement of the right ventricle. The right ventricular (RV) infarction almost invariably develops in association with a large infarction of the adjacent septum and inferior 0 walls, but isolated infarction of the right ventricle is seen in just 3–5% of autopsy-proven cases of MI. This study is designed to assess the right atrial (RA) functions in inferior wall acute myocardial infarction (AMI) (IWMI) echocardiographically and to compare it with patients who do not have history of ischemic heart disease (IHD) but having risk factors for IHD. Aims and Objectives: The aims of this study were to study the patients presenting with Inferior wall MI IWMI for RA function. Materials and Methods: Patients admitted in the Cardiology ward of R G Kar Medical College and Hospital with IWMI from March 2020 to March 2022 were included in the study. Results: Average Measurement of RA volume index (RAVI) and RA Pressure (RAP) was highest among patients with IWMI+RV myocardial infarction (RVMI). Out of 100 IWMI patients, 33 had high RAVI and RAP and out of 100 non-IHD patients none had high RAVI. Conclusion: In our study, there was no statistically significant difference in average RAVI and RAP in patients presenting with IWMI and in patients with risk factors for myocardial infarction but without AMI. However, patients presented with IWMI+RVMI showed statistically significant increased RAVI and RAP as compared to inferior wall AMI only.
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Das et al. (2022) conducted a cross-sectional in Inferior wall acute myocardial infarction (n=200). Inferior wall acute myocardial infarction with or without right ventricular myocardial infarction vs. Patients without ischemic heart disease but with risk factors was evaluated on Median Right Atrial Volume Index (RAVI) in mL/m2 (p=<0.001). Patients with inferior wall acute myocardial infarction and concurrent right ventricular myocardial infarction had significantly higher right atrial volume index and right atrial pressure compared to those with isolated inferior wall infarction or non-ischemic controls.
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