Key result
Post-TEVAR stationary SBP is linked to ~5.3-fold higher odds of procedural success.
Why the study?
Post-TEVAR blood pressure management typically focuses on mean systolic blood pressure, while little is known about how temporal hemodynamic patterns and time-series metrics within the first 24 hours relate to surgical success.
Does combining 24-hour post-TEVAR blood pressure and heart rate time-series stationarity and variability metrics with preoperative CT aortic geometry improve the prediction of secondary surgical intervention (>30 days) compared to preoperative CT geometry alone in patients undergoing TEVAR?
Observational (n=31)
No
Does combining 24-hour post-TEVAR blood pressure and heart rate time-series stationarity and variability metrics with preoperative CT aortic geometry improve the prediction of secondary surgical intervention (>30 days) compared to preoperative CT geometry alone in patients undergoing TEVAR?
Answers are grounded in this paper and cite their sources.
In patients undergoing TEVAR, incorporating 24-hour postoperative systolic blood pressure stationarity and diastolic blood pressure/heart rate variability metrics with preoperative CT aortic geometry improves prediction of reintervention-free survival to 96.67% cross-validation accuracy.
Background Hypertension is a major risk factor for type B aortic dissections and rupture, with guidelines recommending systolic blood pressure (SBP) control below 130 mmHg to improve outcomes. While post-TEVAR blood pressure is often managed with a focus on mean SBP, little is known about temporal hemodynamic patterns and their association with surgical success. This study investigates blood pressure and heart rate (HR) time-series metrics within 24 hours post-TEVAR and their predictive potential for outcomes. Methods Blood pressure (n = 560) and HR (n = 680) time-series data from 31 patients were analyzed alongside preoperative aortic geometry metrics. Exploratory data analysis identified correlations between BP variability and outcomes. Stationarity tests were performed on time-series data to assess statistical properties. Logistic regression models incorporating hemodynamic metrics, along with CT-derived features, were used to predict TEVAR outcomes. Results Successful outcomes correlated with greater diastolic blood pressure variability and strictly stationary SBP. Logistic regression models combining these metrics along with heart rate standard deviation and preoperative aortic geometry achieved 96.67% 5-fold cross-validation accuracy in predicting outcomes. Conclusion Post-TEVAR behaviors of hemodynamic variables are critical predictors of TEVAR success, with higher DBP standard deviation and strict stationarity of SBP significantly associated with favorable outcomes. These findings highlight the importance of hemodynamic variability and stationarity in optimizing post-TEVAR patient care.
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Alakhdar et al. (2026) conducted an observational in Type B aortic dissection undergoing thoracic endovascular aortic repair (TEVAR) (n=31). 24-hour post-TEVAR systolic blood pressure stationarity (ADF test significance at alpha = 0.01) and hemodynamic variability combined with preoperative CT aortic geometry vs. Non-stationary systolic blood pressure / baseline CT geometry alone was evaluated on Successful TEVAR outcome (absence of secondary surgical reintervention >30 days after initial TEVAR) (OR 5.3, p=0.0680). Combining 24-hour post-TEVAR blood pressure stationarity, heart rate variability, and CT geometry achieved 96.67% accuracy in predicting TEVAR success, with stationary SBP linked to success (OR 5.3).
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