Introduction: Cardiology Dept., 4th Medical Clinic, University of Medicine and Pharmacy Targu Miures, Romania.
Methods: 72 patients referred for syncope of unknown etiology underwent tilt testing (TT) with nitroglycerine challenge. SVR, CO, SV and HR were recorded beat-to-beat by Aesculon-Osypka monitor using 4 standard ECG electrodes. Non-invasive BP was measured manually.
Results: POH was found in 12 patients and NTG was used in 3 of them. TT was negative in 15 patients. The SVR (dyns/cm5 /m2) decreased progressively: 1873± 521 initially, 1201± 225(p=0,01) at symptom onset and 901±170 (p<0,01) at the end of test. There was concordance with the BP behavior. Maximum heart rate in POH patients was 98±31 vs. 121±21 (p=0,01). The decrease of SVR was predictive of a positive response.
Conclusions: EV correctly identified the hemodynamic pattern of the POH syndrome. Correlation with other techniques are needed for further assessment.