What does this research mean for the field?

Mechanical cardiac support systems can normalize cardiac function in selected patients with end-stage idiopathic dilated cardiomyopathy, allowing for successful device weaning as an alternative to heart transplantation, with preoperative myocardial fibrosis and anti-beta1-adrenoceptor autoantibodies serving as indicators of recovery. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the long-term impact of mechanical cardiac support system (MCSS) ventricular unloading on cardiac function, anti-beta1-adrenoceptor autoantibodies (A-beta1-AABs), and myocardial fibrosis in patients with idiopathic dilated cardiomyopathy (IDC).

July 15, 1997Circulation

Weaning From Mechanical Cardiac Support in Patients With Idiopathic Dilated Cardiomyopathy

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Why the study?

Does mechanical cardiac support system implantation improve cardiac function and allow device explantation in patients with end-stage idiopathic dilated cardiomyopathy?

Population

17 patients in NYHA functional class IV with nonischemic idiopathic dilated cardiomyopathy, cardiac index <…

Design

Case_series

Follow-up

mean support duration 230+/-201 days

Authors

JMJohannes MüllerBerlin Heart (Germany)GWGerd WallukatHeart Failure / Cardiomyopathy YWYuguo WengDeutsches Herzzentrum der Charité

Discussion

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Implication

Supports feasibility of weaning after prolonged MCSS in select cases; hypothesis-generating and should not change practice.

Key Points

To evaluate the long-term impact of mechanical cardiac support system (MCSS) ventricular unloading on cardiac function, anti-beta1-adrenoceptor autoantibodies (A-beta1-AABs), and myocardial fibrosis in patients with idiopathic dilated cardiomyopathy (IDC).
Assessed N=17 NYHA class IV nonischemic IDC patients (LVEF <16%, LVIDd >68 mm, positive for A-beta1-AABs) who received MCSS with a mean support duration of 230±201 days.
Performed serial echocardiography, serum A-beta1-AAB testing, and histological assessments of myocardial fibrosis before and after MCSS implantation.
Five patients achieved significant cardiac recovery (mean LVIDd 54±2.3 mm, LVEF 47±3.7%) and were weaned from MCSS after 160 to 794 days, remaining device-free for 51 to 592 days.
Serum A-beta1-AABs gradually disappeared during mechanical support and remained absent post-weaning alongside normalized fibrosis volume density.
Nine patients showed minimal functional recovery during ventricular unloading; overall, 6 patients died, 4 underwent cardiac transplantation, and 2 remained on MCSS.

Structured PICO

Does mechanical cardiac support system implantation improve cardiac function and allow device explantation in patients with end-stage idiopathic dilated cardiomyopathy?

Population

17 patients in NYHA functional class IV with nonischemic idiopathic dilated cardiomyopathy (IDC), cardiac index < 1.6 L/min/m2, LVEF <16%, LVIDd >68 mm, and positive for A-beta1-AABs.

Intervention

Mechanical cardiac support systems (MCSS) implantation

Outcome

Cardiac recovery allowing explantation (weaning) of the device, and changes in cardiac function, A-beta1-AABs, and myocardial fibrosissurrogate

Mechanical cardiac support can induce sufficient reverse remodeling and cardiac recovery to allow device weaning in a subset of patients with end-stage idiopathic dilated cardiomyopathy.

Cite This Study

Müller et al. (1997) studied this question.

synapsesocial.com/papers/6a1bc16f27b545b111a8f2df https://doi.org/10.1161/01.cir.96.2.542

Topics

Mechanical circulatory support

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Weaning From Mechanical Cardiac Support in Patients With Idiopathic Dilated Cardiomyopathy

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Topics

Weaning From Mechanical Cardiac Support in Patients With Idiopathic Dilated Cardiomyopathy

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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