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Relationship between Sympathetic Overactivity and Left Ventricular Hypertrophy in Resistant Hypertension
Erdem Özel1, Ahmet Taştan, Ali Öztürk
1Şifa University Cardiology Department, Turkey.
Summary
Patients with resistant hypertension (RH) and left ventricular hypertrophy (LVH) show higher sympathetic overactivity. This finding highlights the link between sympathetic predominance and LVH in RH patients.
Area of Science:
- Cardiology
- Hypertension Research
- Autonomic Nervous System Studies
Background:
- Sympathetic overactivity is implicated in resistant hypertension (RH).
- The specific impact of sympathetic predominance on left ventricular hypertrophy (LVH) in RH remains unclear.
- This study investigates the association between sympathetic activity and LVH in RH patients.
Purpose of the Study:
- To evaluate the relationship between sympathetic overactivity and left ventricular hypertrophy (LVH) in patients with resistant hypertension (RH).
Main Methods:
- 142 RH patients underwent transthoracic echocardiography to assess LVH parameters.
- Patients were categorized into RH/LVH(+) (n=75) and RH/LVH(-) (n=67) groups.
- 24-hour ECG recordings provided mean heart rate and heart rate variability (HRV) metrics (SDNN, SDANN, triangular index) to reflect sympathetic activity.
Main Results:
- Demographics and blood pressure were comparable between groups.
- LVH parameters were significantly elevated in the RH/LVH(+) group.
- RH/LVH(+) patients exhibited higher mean heart rate and lower HRV values (SDNN, SDANN, triangular index) compared to RH/LVH(-) patients.
Conclusions:
- Sympathetic overactivity is significantly more pronounced in RH patients with LVH.
- This suggests a strong link between heightened sympathetic activity and the development of LVH in resistant hypertension.
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