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Prevalence and natural history of left ventricular hypertrophy in hypertension
Insights
Early detection and treatment of hypertension are crucial for preventing left ventricular hypertrophy (LVH), a major risk factor for mortality. Prompt intervention halts LVH progression and may even reverse it.
Area of Science:
- Cardiology
- Hypertension Research
Background:
- Left ventricular hypertrophy (LVH) is a significant complication and mortality risk factor in hypertension.
- LVH can occur early in hypertension, even with normal blood pressure levels, and is linked to reduced cardiac function.
Purpose of the Study:
- To emphasize the importance of early detection and intervention for left ventricular hypertrophy in hypertensive patients.
- To highlight the impact of early hypertension treatment on preventing LVH progression.
Main Methods:
- Review of diagnostic methods for LVH, including echocardiography and electrocardiography (ECG).
- Analysis of LVH prevalence data from studies like the Hypertension Detection and Follow-Up Program (HDFP).
Main Results:
- Echocardiography shows LVH prevalence from 26% to 48% in hypertensive individuals.
- ECG-determined LVH prevalence ranges from 5% to 11%, depending on diagnostic criteria.
- Early and rigorous hypertension treatment can halt and potentially reverse LVH.
Conclusions:
- Early detection of LVH in hypertension is vital.
- Initiating treatment, especially for mild hypertension (diastolic BP 90-104 mmHg), is most effective in preventing LVH.
- Aggressive management of hypertension is key to mitigating LVH and associated mortality risks.
Abstract:
Left ventricular hypertrophy (LVH) is a major complication of hypertension. It is a major risk factor for mortality, including sudden death. Although LVH is not always directly related to the level of blood pressure (BP), it occurs early in the course of hypertension. In the early stages of hypertension, LVH is associated with reduced cardiac function, even in the presence of a well-maintained ejection fraction and cardiac output. Thus, it is important to detect LVH early in the course of hypertension and halt its progression. Prevalence of LVH in the hypertensive population varies, mostly because of the different methods used for its diagnosis. Prevalence of increased left ventricular mass, determined by echocardiography, ranges from 26% to 48% in patients with hypertension. On the other hand, prevalence of tall R wave, ST segment deviation, and T-wave inversion, determined by ECG, is considerably lower than that. In the Hypertension Detection and Follow-Up Program (HDFP), in which all hypertensive participants had a 12-lead ECG at baseline, the prevalence of ECG-determined LVH was between 5% and 11%, depending on criteria used (e.g., tall R wave alone or ST segment deviation). Rigorous treatment of hypertension halts the progression of LVH and may cause regression as well. To be effective, treatment must begin early in the course of hypertension, especially mild hypertension (i.e., diastolic BP (DBP) 90-104 mmHg). It is in the early stages of hypertension that effective treatment will most likely exert its beneficial effect in the prevention of LVH.(ABSTRACT TRUNCATED AT 250 WORDS)