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Cardiac arrhythmias and left ventricular hypertrophy in systemic hypertension

Riffat Sultana1, Nuzhat Sultana, Abdul Rashid

  • 1Karachi Institute of Heart Diseases, Karachi, Pakistan. dr_riffat2@hotmail.com

Journal of Ayub Medical College, Abbottabad : JAMC
|March 30, 2012
PubMed

Insights

Hypertension is linked to a higher risk of cardiac arrhythmias, including atrial fibrillation and ventricular tachycardia. Left ventricular hypertrophy (LVH) is a key risk factor in hypertensive patients, increasing arrhythmia prevalence.

Area of Science:

  • Cardiology
  • Internal Medicine
  • Hypertension Research

Background:

  • Hypertensive left ventricular hypertrophy (LVH) significantly elevates the risk of cardiac arrhythmias and mortality.
  • Systemic hypertension is a major cardiovascular risk factor requiring thorough investigation of associated cardiac conditions.

Purpose of the Study:

  • To determine the prevalence of cardiac arrhythmias in patients with systemic hypertension.
  • To investigate the association between left ventricular hypertrophy (LVH) and cardiac arrhythmias in hypertensive individuals.

Main Methods:

  • A study involving 500 hypertensive patients (mean age >30 years) with comprehensive assessments including blood pressure, ECG, and echocardiography.
  • Holter monitoring and exercise tests were utilized in specific cases to detect arrhythmias.
  • Data collected included patient demographics, comorbidities (diabetes, dyslipidemia, smoking), hypertension duration, and cardiac structural/functional parameters.

Main Results:

  • Elevated Left Ventricular Mass Index (LVMI) was observed in both male (119.2 ± 30 gm/m2) and female (103 ± 22 gm/m2) hypertensive patients.
  • High prevalence of arrhythmias noted: palpitation (84.8%), atrial fibrillation (46.6%), atrial flutter (22.4%), and ventricular tachycardia (19.2%).
  • Holter monitoring revealed significant premature ventricular contractions (PVCs) in 47.5% and premature atrial contractions (PACs) in 41.6% of patients.

Conclusions:

  • A significant association exists between hypertension and the occurrence of cardiac arrhythmias.
  • Left ventricular hypertrophy (LVH), diastolic dysfunction, and left atrial abnormalities are identified as critical risk factors for arrhythmias in hypertensive patients.
  • These findings underscore the importance of managing LVH to mitigate arrhythmia risk and prevent sudden death in hypertensive individuals.
Abstract

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