What is the clinical evidence from this study?

Study design: Observational. Population: Acute myocardial infarction (n=15). Intervention: Residual anterograde flow vs. Absence of anterograde flow. Primary outcome: PET viability and necrosis.

What does this research mean for the field?

Residual anterograde coronary flow during acute myocardial infarction is significantly associated with PET-assessed myocardial tissue viability, which cannot be identified by regional wall motion analysis alone. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate regional myocardial blood flow and glucose metabolism using positron emission tomography in patients with acute myocardial infarction and correlate these findings with coronary anatomy.

September 1, 1987European Heart Journal

Beneficial effect of residual anterograde flow on tissue viability as assessed by positron emission tomography in patients with myocardial infarction

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Key result

Residual anterograde infarct artery flow is linked to PET-defined tissue viability in acute MI.

n=15

Why the study?

Early identification of salvageable myocardium after acute myocardial infarction is clinically important, and the relationship between residual anterograde flow and tissue viability needed clarification.

Does residual anterograde flow improve tissue viability as assessed by PET in patients with acute myocardial infarction?

Population

15 patients with acute myocardial infarction without thrombolytic therapy

Comparison

Presence vs absence of residual anterograde flow in the infarct artery

Design

Observational study using positron emission tomography

Authors

MSMarkus SchwaigerUniversity of Pisa RBRichard C. BrunkenCardiac Imaging JKJanine KrivokapichUniversity of California, Los Angeles

Discussion

Member takes

Implication

Residual anterograde flow may preserve viability post-MI; hypothesis-generating and requires prospective validation.

Key Points

To evaluate regional myocardial blood flow and glucose metabolism using positron emission tomography in patients with acute myocardial infarction and correlate these findings with coronary anatomy.
Evaluated 15 patients with acute myocardial infarction without thrombolytic therapy using N-13 ammonia to assess blood flow and fluorodeoxyglucose (FDG) to assess glucose metabolism.
Assessed 37 left ventricular segments and correlated PET perfusion-metabolism patterns with coronary angiographic evidence of anterograde flow and regional wall motion.
Of 37 left ventricular segments with reduced blood flow, 20 segments showed concordant decreases in FDG uptake indicating necrosis, whereas 17 segments exhibited preserved FDG uptake indicating tissue viability.
Tissue viability and necrosis defined by PET were significantly associated with the presence or absence of residual anterograde flow in the infarct-related artery.
Evaluation of regional wall motion failed to differentiate viable segments from necrotic segments identified by PET criteria.

Study Design

Type

Observational (n=15)

Structured PICO

Does residual anterograde flow improve tissue viability as assessed by PET in patients with acute myocardial infarction?

Population

15 patients with acute myocardial infarction without thrombolytic therapy evaluated for regional blood flow and glucose metabolism.

Exposure

Presence of residual anterograde flow (spontaneous reperfusion) in the infarct artery

Comparator

Absence of anterograde flow in the infarct artery

Outcome

Tissue viability as assessed by positron emission tomography (PET) using N-13 ammonia and FDG uptakesurrogate

PET imaging can identify salvageable myocardium early after acute myocardial infarction, demonstrating that spontaneous reperfusion (residual anterograde flow) is beneficial for tissue survival.

Cite This Study

Schwaiger et al. (1987) conducted an observational in Acute myocardial infarction (n=15). Residual anterograde flow vs. Absence of anterograde flow was evaluated on PET viability and necrosis. Residual anterograde flow in the infarct artery was significantly associated with PET-defined tissue viability (17 viable vs 20 necrotic segments) in patients with acute myocardial infarction.

synapsesocial.com/papers/6aaf9139d714168b8ece9961 https://doi.org/10.1093/oxfordjournals.eurheartj.a062375

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Beneficial effect of residual anterograde flow on tissue viability as assessed by positron emission tomography in patients with myocardial infarction

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Cite This Study

Beneficial effect of residual anterograde flow on tissue viability as assessed by positron emission tomography in patients with myocardial infarction

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Cite This Study

Also Consider

Also Consider