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[QT interval dispersion and hypertension in different variants of left ventricular geometry (population study)]
Insights
Increased QT dispersion, a measure of heart rhythm, is linked to hypertension and specific types of left ventricular hypertrophy. This finding highlights potential cardiovascular risks associated with these conditions.
Area of Science:
- Cardiology
- Electrophysiology
- Cardiovascular Imaging
Context:
- Hypertension is a prevalent cardiovascular risk factor.
- Left ventricular hypertrophy (LVH) is a common adaptation to hypertension.
- QT dispersion reflects cardiac electrical instability.
Purpose:
- To investigate the association between QT dispersion, hypertension, and various forms of left ventricular geometry.
- To determine if specific patterns of left ventricular hypertrophy are related to increased QT dispersion.
Summary:
- A study of 717 individuals (35-59 years) in Tallinn assessed QT dispersion (QT(c)D), blood pressure, and left ventricular geometry via electrocardiography and echocardiography.
- Increased QT(c)D (≥70 ms) was significantly associated with left ventricular hypertrophy, particularly concentric hypertrophy.
- Hypertensive subjects exhibited a higher frequency of prolonged QT(c)D.
Impact:
- Findings suggest that QT dispersion may serve as an indicator of electrical risk in hypertensive patients with left ventricular hypertrophy.
- This research could inform risk stratification and management strategies for cardiovascular disease.
- Understanding the interplay between cardiac structure and electrical activity is crucial for preventing adverse cardiac events.
Aim:
To assess relationship between QT dispersion, hypertension, and different variants of left ventricular geometry (concentric or eccentric hypertrophy, concentric remodeling).
Material And Methods:
Blood pressure measurement, electro- and echocardiography were used in the study of a random sample of Tallinn population (321 men and 396 women) aged 35-59 years. Corrected QT dispersion (QT(c)D) equal to or exceeding 70 ms was considered increased.
Results:
Increase of QT(c)D was associated with left ventricular hypertrophy, especially with its concentric variant. QT(c)D prolongation was significantly more frequent in subjects with hypertension.