Heart rate variability parameters correlate with functional independence measures in ischemic stroke patients

Area of Science:

• Cardiology
• Neurology
• Rehabilitation Medicine

Background:

• Ischemic stroke can impact cardiovascular regulation.
• Understanding post-stroke cardiovascular function is crucial for rehabilitation.
• Previous research has explored stroke's effects on the autonomic nervous system.

Purpose of the Study:

• To investigate the relationship between heart rate variability (HRV) and functional recovery in patients post-ischemic supratentorial stroke.
• To assess HRV as a potential prognostic indicator for functional independence in stroke survivors.

Main Methods:

• Electrocardiograms (ECGs) were recorded during physiotherapy in 16 stroke patients (54-85 years old) without prior cardiac history.
• Heart rate variability (HRV) parameters, including standard deviation of RR series, and low (LF) and high (HF) frequency power spectrums, were calculated.
• Functional Independence Measure (FIM) scores were assessed at admission and before discharge.

Main Results:

• All calculated HRV parameters demonstrated a statistically significant relationship with FIM scores at both admission and discharge.
• A positive correlation was observed: higher HRV parameter values corresponded to higher FIM scores.
• This suggests HRV reflects the degree of functional recovery and independence.

Conclusions:

• HRV parameters are significantly correlated with clinical measures of functional status in stroke patients.
• Increased HRV is associated with greater functional independence post-stroke.
• HRV analysis presents a potential prognostic tool for evaluating functional performance in stroke rehabilitation.