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BACKGROUND We describe the performance of an implantable hemodynamic monitor (IHM) that allows continuous recording of heart rate, patient activity levels, and right ventricular systolic, right ventricular diastolic, and estimated pulmonary artery diastolic pressures. Pressure parameters derived from the implantable monitor were correlated to measurements(More)
BACKGROUND Care and management of patients with congestive heart failure (CHF) is a major health-care challenge. The value of acute hemodynamic data in assessing heart failure has been questioned in some studies, while more intensive hemodynamic monitoring has been reported to improve patient care in others. A series of patient studies are reported here(More)
OBJECTIVES This study examined the characteristics of continuously measured right ventricular (RV) hemodynamic information derived from an implantable hemodynamic monitor (IHM) in heart failure patients. BACKGROUND Hemodynamic monitoring might improve the day-to-day management of patients with chronic heart failure (CHF). Little is known about the(More)
BACKGROUND Approximately half of all patients with chronic heart failure (HF) have a decreased ejection fraction (EF) (systolic HF [SHF]); the other half have HF with a normal EF (diastolic HF [DHF]). However, the underlying pathophysiological differences between DHF and SHF patients are incompletely defined. The purpose of this study was to use(More)
Recent studies have demonstrated that pulmonary artery diastolic (PAD) pressure can be measured from a transducer positioned in the right ventricle (RV) based on the finding that PAD and RV pressures are equal at the time of pulmonary valve opening, which is associated with the time of maximum positive rate of pressure development (dP/dtmax) in the(More)
The development of an implantable haemodynamic monitor (IHM) has made possible the home monitoring of a patient's central haemodynamic trends during daily living. We have evaluated the usability and transmission success of such a system over a 3.2-year period. Patients with an IHM were able to transmit the stored data every week to a Web server, where trend(More)
BACKGROUND Intracardiac pressures in heart failure (HF) have been measured in patients while supine in the hospital but change at home with posture and activity. The optimal level of chronic ambulatory pressure is unknown. This analysis compared chronic intracardiac pressures to later HF events and sought a threshold above which higher pressures conferred(More)
Clinical trial results support the hypothesis that implantable hemodynamic monitoring (IHM) systems may reduce hospitalizations among patients with chronic heart failure (HF). The Reducing Decompensation Events Utilizing Intracardiac Pressures in Patients With Chronic Heart Failure (REDUCE hf  ) study was a prospective, randomized, multicenter,(More)
BACKGROUND Nearly half of all patients with chronic heart failure (HF) have a normal ejection fraction (EF), and abnormal diastolic function (ie, diastolic heart failure [DHF]). However, appropriate management of DHF patients remains a difficult and uncertain challenge. METHODS AND RESULTS The Chronicle Offers Management to Patients with Advanced Signs(More)
BACKGROUND The purpose of this study was to determine which pressure-based hemodynamic factor was most closely associated with the transition from chronic compensated to acute decompensated heart failure. METHODS AND RESULTS Intracardiac pressures were retrospectively examined in 274 heart failure patients using an implantable hemodynamic monitor. The(More)