Related Experiment Videos
Early recanalization and plasma brain natriuretic peptide as an indicator of left ventricular function after acute
Teruo Inoue1, Masashi Sakuma, Isao Yaguchi
1Department of Cardiology, Koshigaya Hospital, Dokkyo University School of Medicine, Saitama, Japan.
Insights
Plasma brain natriuretic peptide (BNP) levels measured early after acute myocardial infarction (AMI) can predict long-term heart function. Early artery reopening influences BNP levels and cardiac outcomes.
Area of Science:
- Cardiology
- Biomarkers
- Myocardial Infarction
Background:
- Plasma brain natriuretic peptide (BNP) levels are measured in acute myocardial infarction (AMI) but their relation to early recanalization and chronic cardiac function is unclear.
- This study aimed to clarify the role of BNP in predicting left ventricular function after AMI.
Purpose of the Study:
- To determine if early recanalization in AMI modulates plasma BNP levels.
- To assess the predictive value of plasma BNP levels for chronic-stage left ventricular function.
Main Methods:
- Plasma BNP levels were measured in 80 AMI patients at admission, 4, 24, 48 hours, and 1 month post-admission.
- Patients were categorized into groups based on infarct-related artery patency within 6 hours of MI onset.
Main Results:
- Patients with a 6-hour occlusion had significantly higher BNP levels at 4, 24, and 48 hours compared to those with 6-hour patency.
- Chronic left ventricular function correlated with BNP levels at various time points, notably at 24 and 48 hours.
- BNP levels at 24 hours post-admission were identified as the strongest predictor of chronic left ventricular function.
Conclusions:
- Plasma BNP levels are predictive of subsequent cardiac function in AMI patients.
- BNP kinetics may support the importance of early recanalization in AMI management.
Background:
Although plasma brain natriuretic peptide (BNP) levels have been widely measured in patients with acute myocardial infarction (AMI), it is still uncertain whether the early recanalization modulates the levels and whether the levels can predict chronic stage left ventricular function. This study was designed to elucidate these issues.
Methods:
In 80 consecutive patients with AMI, plasma BNP levels were measured at admission and at 4 hours, 24 hours, 48 hours, and 1 month after admission.
Results:
In 35 of the 80 patients, the infarct-related artery was patent within 6 hours from the onset of MI (6-hour patency group), and in 27 patients, the artery was still occluded after 6 hours (6-hour occlusion group). The remaining 18 patients in whom it was unclear whether recanalization of the infarct-related artery had occurred within 6 hours or not were excluded from the analyses. In the 6-hour patency group, the BNP level gradually increased and reached a maximum value at 24 hours after admission. In the 6-hour occlusion group, the level increased more, with the values at 4 hours, 24 hours, and 48 hours significantly higher than those in the 6-hour patency group (86 +/- 18 pmol/L versus 35 +/- 8 pmol/L; P <.01; 112 +/- 13 pmol/L versus 74 +/- 9 pmol/L; P <.05; 102 +/- 15 pmol/L versus 53 +/- 11 pmol/L; P <.01). Chronic stage left ventricular function was correlated with not only the BNP level at same stage but also that at 24 hours and that at 48 hours after admission. Multiple regression analysis indicated that the BNP level at 24 hours was the most powerful predictor of chronic stage left ventricular function.
Conclusion:
Plasma BNP levels can predict subsequent cardiac function. In addition, the importance of early recanalization may also be supported with BNP kinetics.