Inferior Vena Cava—Balloon Occlusion and Its Effect on the Myocardium During Endograft Deployment in the Arch

Abstract

Purpose:

To evaluate the impact of cava balloon occlusion on the myocardium during endovascular repair of thoracic aortic pathologies.

Material and methods:

A prospective observational cohort study of 21 patients who underwent endovascular repair of aortic arch and thoracic aorta in a single tertiary referral center with use of inferior vena cava (IVC) balloon occlusion as a method of intraoperative cardiac output reduction. Pre-, intra-, and postoperative measurements of heart rate, blood pressure, stroke volume index, and central venous oxygen saturation were noted. High-sensitive serum troponin levels were also analyzed according to a pre-established protocol. Endpoints were cardiac troponin T levels after induced hypotension and left ventricular ejection fraction during follow-up. Secondary endpoints were procedure technical success and overall survival.

Results:

Twenty-one patients (18 male, median age 69, (62-75, IQR)) enrolled in the study between May 2015 and January 2019. Indication for endovascular treatment was an aortic arch aneurysm (n=10), descending aortic aneurysm (n=8), lusorian artery aneurysm (n=2), and thoracoabdominal aortic aneurysm (n=1). Median time to reach half mean arterial pressure was 60 seconds while median recovery time of blood pressure was 135 seconds. In 5 (24%) cases, we observed a > 50% change of Troponin T on the reference level. Technical success was achieved in all cases. Two (10%) patients developed new and persistent atrial fibrillation and 1 (5%) suffered a peri-operative ST-elevation myocardial infarction.

Conclusion:

The use of IVC balloon occlusion is a feasible technique for cardiac output reduction during endovascular repair of thoracic aortic pathologies. One fourth of the patients develop significant troponin leakage but the significance of the finding needs further studies.

Keywords

aortic arch aneurysm thoracic aneurysm endovascular repair inferior vena cava balloon cardiac stress myocardium

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