Twelve-month follow-up results from the SIRONA 2 clinical trial.

AIMS: In the SIRONA 2 trial, the safety and efficacy of pulmonary artery (PA) pressure (PAP)-guided heart failure (HF) management using a novel PAP sensor were assessed at 30 and 90 days, respectively, and both endpoints were met. The current study examines the prespecified secondary endpoints of safety and accuracy of the PA sensor along with HF hospitalizations and mortality, HF symptoms, functional capacity, quality of life, and patient compliance through 12 months. METHODS AND RESULTS: SIRONA 2 is a prospective, multi-centre, open-label, single-arm trial evaluating the Cordella™ PA Sensor System in 70 patients with New York Heart Association (NYHA) functional class III HF with a prior HF hospitalization and/or increase of N-terminal pro-brain natriuretic peptide within 12 months of enrolment. Sensor accuracy was assessed and compared with measurements obtained by standard right heart catheterization (RHC). Safety was defined as freedom from prespecified adverse events associated with use of the Cordella PA Sensor System and was assessed in all patients who entered the cath lab for PA sensor implant. HF hospitalizations and mortality, HF symptoms, functional capacity, quality of life, and patient compliance were also assessed. At 12 months, there was good agreement between the Cordella PA Sensor System and RHC, with the average difference for mean PAP being 2.9 ± 7.3 mmHg. The device safety profile was excellent with 98.4% freedom from device/system-related complications. There were no pressure sensor failures. HF hospitalizations and mortality were low with a rate of 0.33 event per patient year. Symptoms as assessed by NYHA (P < 0.0001) and functional capacity as measured by 6 min walk test (P = 0.02) were significantly improved. Patients' adherence to daily transmissions of PAP and vital signs measurements was 95%. CONCLUSIONS: Long-term follow-up of the SIRONA 2 trial supports the safety and accuracy of the Cordella PA Sensor System in enabling comprehensive HF management in NYHA class III HF patients.

Safety and efficacy of a wireless pulmonary artery pressure sensor: primary endpoint results of the SIRONA 2 clinical trial.

AIMS: Implantable pulmonary artery pressure (PAP) sensors have been shown to reduce heart failure hospitalizations (HFH) in selected patients. The goal of this study was to evaluate the safety and efficacy of a novel wireless PAP monitoring system in patients with heart failure (HF). METHODS AND RESULTS: This is a prospective, multi-centre, open-label, single-arm trial evaluating the safety and efficacy of the Cordella™ PA Sensor System including the comprehensive Cordella™ Heart Failure System (CHFS) in patients with New York Heart Association (NYHA) Class III heart failure with a heart failure hospitalization and/or increase of N-terminal pro-Brain Natriuretic Peptide (NT-proBNP) within 12 months of enrolment. The primary efficacy endpoint was the accuracy of PA sensor mean PAP measurements, compared with fluid-filled catheter mean PAP measurements obtained by standard right heart catheterization (RHC) at 90 days post-implant, assessed in all patients with a successful implant. The primary safety endpoint was freedom from adverse events associated with use of the Cordella PA Sensor System through 30 days post-implant, assessed in all patients who entered the cath lab for PA sensor implant. The PA sensor was successfully implanted in 70 patients. Equivalence between the PA sensor and RHC for mean pulmonary artery pressures was excellent with measurements confined within the equivalence bounds of -4.0 to 4.0 mmHg (mean PAP: 0.0 to 2.9 mmHg, P = 0.003). The device safety profile was excellent with 98.6% freedom from Device System Related Complications, defined as invasive treatment, device explant or death. There were no pressure sensor failures. Patients' adherence to daily measurement transmissions of PAP and vital signs was 94%. CONCLUSIONS: This trial supports the safety and efficacy of the Cordella PA Sensor System and in conjunction with the CHFS enables comprehensive HF management in NYHA class III heart failure patients.