Cardiac resynchronization therapy improves psycho-cognitive performance in patients with heart failure

Area of Science:

• Cardiology
• Neuroscience
• Psychiatry

Background:

• Patients with congestive heart failure (CHF) and severe left ventricular dysfunction often experience cognitive decline and depression.
• The impact of contemporary device therapies, such as cardiac resynchronization therapy with a defibrillator (CRT-D) and implantable cardioverter-defibrillators (ICDs), on these psycho-cognitive aspects in CHF patients remains inadequately studied.

Purpose of the Study:

• To investigate the effects of CRT-D compared to ICD therapy on cognitive performance and depression symptoms in patients with CHF and severe left ventricular dysfunction.

Main Methods:

• A prospective, controlled, investigator-blinded study enrolled 74 CHF patients: 45 receiving CRT-D and 29 receiving ICD (control).
• Neuropsychological tests, including the mini-mental state examination, DemTect, age-concentration test, and Beck depression inventory, were administered at baseline, 3 months, and 6 months post-implantation.

Main Results:

• CRT-D implantation led to significant improvements in DemTect scores (P = 0.007) and age-concentration test performance (P = 0.005) compared to ICD.
• Significant improvements were observed in mini-mental state examination scores (P = 0.043) and a reduction in depression symptoms (Beck depression inventory, P < 0.001) in the CRT-D group versus the ICD group.

Conclusions:

• This study provides the first evidence of psycho-cognitive benefits from CRT-D in CHF patients with severe left ventricular dysfunction.
• The observed improvements in cognitive function and mood with CRT-D, unlike ICD therapy, may be linked to enhanced cardiac function and hemodynamics.