March 1, 1978Circulation236 citationsOpen Access

The noninvasive diagnosis of right ventricular infarction.

Q: What is the clinical evidence from this study?

Study design: Observational. Population: Acute transmural myocardial infarction (n=26). Intervention: Right ventricular involvement vs. Inferior MI without RV involvement and anterior MI. Primary outcome: RV/LV area ratios, RV end-diastolic dimension, and RV stroke work index.

DSD. N. SharpeUniversity of Auckland EBE H BotvinickUniversity of California, San Francisco DSD M ShamesSan Francisco General Hospital

Key Result

Patients with inferior MI and right ventricular involvement had significantly greater RV dimensions and lower RV stroke work index compared to those without RV involvement.

Study Design

Type

Observational (n=26)

Structured PICO

Can scintigraphy and echocardiography noninvasively diagnose right ventricular infarction in patients with acute transmural myocardial infarction?

Population

26 patients with acute transmural myocardial infarction evaluated for right ventricular infarction using noninvasive imaging.

Exposure

Noninvasive imaging using scintigraphy (infarct scintigraphy, gated radioangiography) and echocardiography

Comparator

Comparison between patients with inferior MI with RV involvement (n=6), inferior MI without RV involvement (n=9), and anterior MI (n=11)

Outcome

Anatomic and functional evidence of right ventricular infarction (including RV/LV area ratios, RV end-diastolic dimension, RV/LV end-diastolic dimension ratio, and RV stroke work index)surrogate

Scintigraphy and echocardiography can provide noninvasive anatomic and functional evidence to accurately diagnose right ventricular involvement in patients with acute inferior myocardial infarction.

Abstract

We evaluated scintigraphy and echocardiography for the diagnosis of right ventricular (RV) infarction. Of 26 patients with acute transmural myocardial infarction (MI), six with inferior MI had abnormal radionuclide uptake localized to the RV free wall on infarct scintigraphy or segmental akinesis of the RV free wall on gated radioangiography or both. These six patients with RV involvement (group I) were compared with the remaining nine with inferior MI (group II) and 11 with anterior MI (group III). RV/LV area ratios determined radioangiographically were significantly greater in group I than group II in diastole and systole. Echocardiographic RV enddiastolic dimension and RV/LV end-diastolic dimension ratio were significantly greater and RV stroke work index was significantly lower in group I than in group II. Predominant RV involvement in inferior MI may occur commonly. Anatomic and functional evidence of this diagnosis can be obtained noninvasively.

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Cite This Study

Sharpe et al. (Wed,) conducted a observational in Acute transmural myocardial infarction (n=26). Right ventricular involvement vs. Inferior MI without RV involvement and anterior MI was evaluated on RV/LV area ratios, RV end-diastolic dimension, and RV stroke work index. Patients with inferior MI and right ventricular involvement had significantly greater RV dimensions and lower RV stroke work index compared to those without RV involvement.

synapsesocial.com/papers/6a62cc0e4f5ef41b946a6ec0 https://doi.org/https://doi.org/10.1161/01.cir.57.3.483

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