Higher pre-surgery neuropeptide Y (NPY) levels independently predicted postoperative atrial fibrillation in 120 patients undergoing off-pump coronary bypass surgery.
27.5% developed AFibafter bypass surgery, with elevated pre-surgical NPY levels independently predicting who would develop this complication
What the researchers found
Pre-surgical plasma NPY levels independently predicted POAF (OR 1.055 per unit increase, P=0.041) alongside age (OR 1.135) and left atrial size (OR 1.136) in multivariable analysis. NPY was significantly higher in the POAF group (31.72 vs 27.95, P=0.014).
Why it matters
A simple blood test measuring NPY levels before heart surgery could identify patients at high risk for postoperative atrial fibrillation, enabling preventive interventions that reduce complications, hospital stays, and stroke risk.
The numbers in context
Patients were enrolled from January 1 to May 31, 2020, undergoing isolated off-pump CABG with NPY measurements.
How the study worked
Prospective cohort study of 120 consecutive patients undergoing isolated off-pump CABG (January-May 2020). Pre-operative plasma NPY measured by ELISA. POAF detected by 7-day Holter monitoring. Multivariable logistic regression for independent predictors.
Who was studied
Patients undergoing off-pump coronary artery bypass grafting from January-May 2020
What this study cannot tell us
Single-center study with 120 patients during a 5-month period. The modest odds ratio for NPY (1.055) suggests it adds incremental value but is not a strong standalone predictor. Association does not prove causation. Heart rate variability correlations were weak-to-moderate. External validation in larger cohorts needed.
How to read the evidence
Moderate evidence: prospective cohort with multivariable analysis and objective outcome assessment (7-day Holter), but single center with modest sample size.
When this study was published
Published in 2024 using data from 2020. Pre-COVID surgical cohort.
The bigger picture
NPY is one of the most abundant neuropeptides in the cardiovascular system. This study connects NPY to cardiac autonomic regulation and arrhythmia risk, suggesting that neuropeptide signaling plays a direct role in post-surgical heart rhythm stability. It adds to growing evidence that neuropeptide biomarkers could transform surgical risk assessment.
Questions still open
- Would interventions to lower NPY levels or block NPY signaling before surgery reduce postoperative AFib?
- Can NPY be combined with other biomarkers for a more accurate AFib risk prediction panel?
- Does elevated NPY predict AFib risk in other cardiac surgery types beyond off-pump CABG?
Common questions
What is neuropeptide Y and what does it do in the heart?
Could a blood test predict AFib after surgery?
Read the original research
Circulating neuropeptide Y as a biomarker in postoperative atrial fibrillation cases administered off-pump coronary bypass Graft surgery.
Heliyon, 10(10), e31251
Citation
Zhang, Jian; He, Yuanchen; Yin, Zongtao; Li, Rui; Zhang, Xiaohui; Wang, Yang; Wang, Huishan. (2024). Circulating neuropeptide Y as a biomarker in postoperative atrial fibrillation cases administered off-pump coronary bypass Graft surgery.. Heliyon, 10(10), e31251. https://doi.org/10.1016/j.heliyon.2024.e31251