ST-T segment changes in patients with essential hypertension

Area of Science:

• Cardiology
• Internal Medicine
• Hypertension Research

Background:

• Essential hypertension (EH) can manifest electrocardiogram (ECG) changes.
• Ischaemic ST-T segment alterations are a concern in patients with EH.
• The role of left ventricular hypertrophy (LVH) in these ECG changes is unclear.

Purpose of the Study:

• To investigate the underlying cause of ischaemic ST-T segment changes in patients with essential hypertension.
• To determine the association between ST-T segment changes, coronary artery disease (CAD), and left ventricular hypertrophy (LVH) in EH.

Main Methods:

• Comparison of ECG findings with coronary arteriograms and autopsy results.
• Stratification of patients into two groups: those without LVH (Group A, n=75) and those with LVH (Group B, n=50).
• Statistical analysis to assess the significance of the association between ST-T changes and CAD.

Main Results:

• In Group A (no LVH), 39 of 75 patients had pathologic ST-T changes, all associated with CAD.
• In Group B (with LVH), 20 of 50 patients had pathologic ST-T changes, with 16 linked to CAD.
• A significant association between pathologic ST-T segments and CAD was observed in both groups.

Conclusions:

• Ischaemic ST-T segment changes in essential hypertension are predominantly attributable to underlying coronary artery disease (CAD).
• The presence or absence of left ventricular hypertrophy (LVH) does not alter the primary role of CAD in causing these ECG abnormalities.
• Clinical evaluation of EH patients with ST-T changes should prioritize the assessment for coronary artery disease.