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(Circulation. 1997;95:1222-1230.)
© 1997 American Heart Association, Inc.
Articles |
Loading Manipulations Improve the Prognostic Value of Doppler Evaluation of Mitral Flow in Patients With Chronic Heart Failure
the Salvatore Maugeri Foundation, IRCCS, Montescano Medical Center, Montescano, Pavia, and NOUSTAT s.r.l. (M.S.), Milan, Italy.
Correspondence to Massimo Pozzoli, MD, Department of Cardiology, Montescano Medical Center, Montescano, Pavia, Italy.
Background Mitral flow velocity patterns (MFVPs) evaluated by Doppler echocardiography are strong predictors of survival in various cardiac diseases. However, MFVPs may change over time according to loading conditions. We performed this prospective study to assess whether changes in MFVP induced by loading manipulations provided additional prognostic information in 173 patients with chronic heart failure.
Methods and Results Simultaneous Doppler echocardiographic and right-sided hemodynamic recordings were obtained at baseline in all patients, during nitroprusside infusion in the 98 patients who had a baseline restrictive (early-to-late flow velocity ratio >1 and deceleration time 
130 ms) MFVP, and during passive leg lifting in the 75 patients who had a baseline nonrestrictive MFVP. Patients were categorized, according to changes in MFVP, into four groups: 61 patients with an irreversible restrictive, 37 with a reversible restrictive, 48 patients with a stable nonrestrictive, and 27 patients with an unstable nonrestrictive MFVP. Fifty patients experienced major cardiac events. Cox analysis revealed that MFVP was a strong predictor of events and that the response to loading manipulations improved its prognostic value. Patients with an irreversible restrictive MFVP had a higher event rate (51%) than patients with a reversible restrictive MFVP (19%). Among patients with a baseline nonrestrictive MFVP, those with a stable nonrestrictive MFVP had the lowest event rate (6%), whereas the event rate was 33% in patients with an unstable nonrestrictive MFVP.
Conclusions In patients with chronic heart failure, MFVPs provide independent prognostic information. Their prognostic value can be further increased by assessment of the changes induced in them by loading manipulations.
Key Words: heart failure • prognosis • diastole
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