PURPOSE: To detemine the impact of pulmonary artery thromboendarterectomy (PTE) on right ventricular stroke work index (RVSWI).
METHODS: A retrospective chart rewiew was conducted of patients undergoing PTE. We extracted demographics, symptoms, pre- and post PTE hemodynamics, and outcomes.
RESULTS: Between Dec 1994 and Dec 2003 a total of 30 patients underwent PTE at our institution. Most common presenting symptom was SOB (96.7%). Pre PTE mean PAP was 48.5 mmHg. with associated SPAP, DPAP, PVR and RVSWI of 77.9 mmHg, 27.0 mmHg, 562.5 dynes and 1033.3 respectively. Post PTE mean PAP decreased to 26.9 mmHg (p <0.05). This improvement in PAP resulted in a decrease in PVR (232 dynes, p <0.05) and a decrease in RVSWI (624. 9, p <0.05). At a mean f/u of 3.5 yrs the survival for the entire group was 80.3%.
CONCLUSION: PTE is associated to a significant decrease in pulmonary artery pressures which ultimately results in a decrease in the amount of load bestowed upon the right ventricle. Survival in this group of patients seems to be in part related to the improvemnt in RVSWI.
CLINICAL IMPLICATIONS: Findings in this study would suggest that RVSWI may be used as a predictor of clinical improvement following PTE.
DISCLOSURE: Gonzalo Gonzalez-Stawinski, None.