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Utilizing Percutaneous Ventricular Assist Devices in Acute Myocardial Infarction Complicated by Cardiogenic Shock
Published on: June 12, 2021
Clinical impact of guideline-directed medical therapy in patients with left ventricular assist device: an
Miloud Cherbi1, Clément Delmas2, Paul Gautier2
1Department of Cardiology, AZ Sint-Jan Hospital, Ruddershove 10, 8000 Bruges, Belgium.
Insights
Guideline-directed medical therapy (GDMT) significantly improves survival and reduces ventricular arrhythmias in left ventricular assist device (LVAD) patients. However, less than 30% of patients receive optimal triple therapy, indicating a need for better implementation strategies.
Area of Science:
- Cardiology
- Medical Devices
- Pharmacology
Background:
- Guideline-directed medical therapy (GDMT) is recommended for left ventricular assist device (LVAD) recipients.
- Real-world evidence on GDMT's clinical impact in LVAD patients is limited.
Purpose of the Study:
- To evaluate the association between GDMT prescription and clinical outcomes in LVAD patients.
- To assess the impact of GDMT on survival and ventricular arrhythmias in LVAD recipients.
Main Methods:
- International retrospective multicenter study of 875 LVAD patients.
- Patients categorized by GDMT (ACE-I/ARBs, beta-blockers, MRAs) prescription.
- Primary outcome: 6-month all-cause mortality; Secondary outcome: late ventricular arrhythmias (VAs).
Main Results:
- Only 29.8% of patients received triple GDMT; 11.1% received none.
- Increased GDMT prescription associated with significantly improved survival (aHRs 0.39-0.51) and reduced VAs (aHR 0.65).
- Triple GDMT correlated with greater left ventricular end-diastolic diameter improvement (66.1% vs 51.5%).
Conclusions:
- GDMT use in LVAD patients is linked to better survival, with benefits seen even with single-agent therapy.
- Suboptimal triple therapy prescription (30%) highlights the need for improved implementation and standardized protocols.
- Further research should focus on optimizing GDMT strategies for LVAD recipients.
Background:
While guideline-directed medical therapy (GDMT) is recommended for left ventricular assist device (LVAD) recipients, real-world evidence supporting its clinical impact remains limited. This study evaluated the association between GDMT prescription and clinical outcomes in LVAD patients.
Methods:
This international retrospective multicentre study included 875 LVAD patients from 22 centres. Patients were categorized based on the number of GDMT (ACE-I/ARBs, beta-blockers, MRAs) prescribed. Primary outcome was 6-month all-cause mortality. Secondary outcome was late ventricular arrhythmias (VAs) (>30 days post-implant). Multivariable Cox regression and ordinal logistic regression analyses were performed.
Results:
Overall, only 261 patients (29.8%) received triple GDMT, while 97 (11.1%) received no GDMT. After multivariable adjustment, the number of prescribed GDMTs was independently associated with improved survival, with aHRs for all-cause mortality of 0.51 (0.33-0.75, P < .01) for triple therapy, 0.39 (0.26-0.59, P < .01) for dual therapy, and 0.45 (0.30-0.67, P < .01) for single therapy, all compared with no GDMT. Similarly, ACE-I/ARB were associated with a lower risk of late VAs (aHR 0.65 [0.50-0.84], P < .01). Female sex, diabetes, early VAs, and higher bilirubin levels were associated with lower GDMT prescription rates. Major LVEDD improvement (≥10 mm reduction) increased progressively from 51.5% without GDMT to 66.1% with triple therapy.
Conclusion:
In this large international study, the use of GDMT in LVAD patients was associated with improved survival, with benefits observed even with single-agent therapy. Despite these benefits, only 30% of patients received optimal triple therapy, highlighting the need for improved implementation strategies and standardized protocols in this population.
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