Key result
RV involvement in inferior MI is linked to ~13-point lower RA septal systolic strain.
Why the study?
Right atrial functional changes have been evaluated in coronary artery disease, but right atrial involvement in patients with myocardial infarction is not fully elucidated.
Does right ventricular involvement impair right atrial longitudinal strain and strain rate in patients with acute first inferior wall myocardial infarction?
Case-Control (n=85)
Does right ventricular involvement impair right atrial longitudinal strain and strain rate in patients with acute first inferior wall myocardial infarction?
Right ventricular involvement in patients with a first inferior myocardial infarction is associated with significant impairment of right atrial reservoir and conduit function as detected by 2D speckle tracking echocardiography.
Answers are grounded in this paper and cite their sources.
RV involvement in inferior MI was associated with impaired RA strain; hypothesis-generating for atrial imaging in post-MI risk stratification.
Background: The right atrium (RA), has received the least attention by researchers. Many reports demonstrated that, RA function may be impaired in the early stages of cardiac disease. The RA plays an important role in maintaining right ventricular (RV) output. RA functional changes have been evaluated in patients with coronary artery disease, but RA affection is not fully elucidated in patients with myocardial infarction (MI) Objective: To assess RA function by 2-Dimensional speckle tracking echocardiography (2D-STE) imaging in patients with acute first left ventricular (LV) inferior wall MI with and without RV involvement. Patients & Twenty five age and sex -matched healthy volunteers were included as a control group (group I). Assessment of RA function was done in all subjects using (2D-STE) for measurements of RA septal and free walls longitudinal strain and strain rate (SR). RA septal wall and global early diastolic strain rate were also significantly reduced in group III (- 0.77±0.46 s-1 and – 3.61±0.55 s-1) compared to group I (-1.38±0.74 s-1 and – 4.41±0.67 s-1) and group II (-1.07±0.76 s-1 and -3.73±0.76 s-1), (P=0.005), (P<0.001) respectively. This result may illustrate the significant relation between RV & RA which is still under research.
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Elnoamany et al. (2020) conducted a case-control in Acute first left ventricular inferior wall myocardial infarction with and without right ventricular involvement (n=85). Right ventricular involvement in acute first inferior myocardial infarction vs. Acute first inferior myocardial infarction without right ventricular involvement and healthy controls was evaluated on Right atrial septal wall and global longitudinal systolic strain and early diastolic strain rate measured by 2D speckle tracking echocardiography (p=<0.001). Right ventricular involvement in first inferior MI significantly reduced RA septal systolic strain compared to inferior MI without RV involvement and controls (22.5% vs 35.7% and 37.5%; P<0.001).
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