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Effect of treatment on systolic time intervals in systemic arterial hypertension
Insights
Systolic time intervals (STI) detect early left ventricular dysfunction in hypertensive patients before clinical signs appear. STI measurements can guide treatment effectiveness when other methods are less sensitive.
Area of Science:
- Cardiology
- Internal Medicine
Background:
- Hypertension often leads to cardiac complications, including left ventricular dysfunction and hypertrophy.
- Early detection of left ventricular dysfunction is crucial for timely intervention in hypertensive patients.
Purpose of the Study:
- To investigate the utility of systolic time intervals (STI) in identifying early left ventricular dysfunction in hypertensive patients.
- To assess the correlation between STI changes and left ventricular hypertrophy (LVH).
Main Methods:
- Systolic time intervals (STI) were measured in 26 hypertensive patients and 25 healthy controls.
- Clinical, radiological, and electrocardiographic criteria were used to assess left ventricular hypertrophy (LVH).
Main Results:
- Hypertensive patients showed altered STI, indicating left ventricular dysfunction, prior to evidence of LVH.
- Specifically, prolonged pre-ejection period (PEP) and increased PEP/LVET ratio were observed.
- Left ventricular performance improved with treatment in patients without LVH.
Conclusions:
- STI serves as a sensitive indicator of early left ventricular dysfunction in hypertension.
- STI can be a valuable tool for monitoring treatment response in hypertensive patients, especially when other non-invasive methods are less effective.
Abstract:
Twenty six hypertensive patients and 25 control subjects were studied and their systolic time intervals (STI) were measured. It was found that an alteration in STI, signifying left ventricular dysfunction sets in most of the hypertensives earlier than any evidence of left ventricular hypertrophy (LVH) by clinical, radiological or electrocardiographic criteria. The parameters affected are the PEP interval which shows prolongation and PEP/LVET ratio which is increased. After treatment the left ventricular performance was found to improve in those who did not reveal evidence of LVH. Thus STI may be a sensitive indicator of early left ventricular dysfunction in hypertensives and a useful guide to assess improvement after treatment at a stage when other non-invasive methods are not so useful.