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Published on: June 14, 2016
[Diastolic dysfunction as a cause of heart failure in the hypertensive patient]
1Cátedra de Cardiología, Universidad del País Vasco, Bilbao, España.
Insights
Hypertension impacts the heart in four grades, from diastolic dysfunction to dilated cardiomyopathy. This classification aids in understanding disease progression and patient outcomes.
Area of Science:
- Cardiology
- Hypertension Research
- Cardiac Pathophysiology
Context:
- Hypertensive cardiomyopathies represent a spectrum of cardiac damage.
- Understanding the stages is crucial for effective management.
Purpose:
- To classify hypertensive cardiomyopathies into four distinct grades.
- To correlate pathophysiological changes with clinical presentation and prognosis.
Summary:
- Grade I: LV diastolic dysfunction without hypertrophy.
- Grade II: LV diastolic dysfunction with LV hypertrophy (IIA normal exercise capacity, IIB impaired).
- Grade III: Congestive heart failure with preserved EF (>50%), subdivided into IIIA (high LV mass/volume ratio, minimal ischemia) and IIIB (low LV mass/volume ratio, significant ischemia).
- Grade IV: Dilated cardiomyopathy with LV hypertrophy and reduced EF (<50%).
Impact:
- Provides a framework for stratifying patients with hypertensive heart disease.
- Facilitates differentiated treatment strategies based on disease severity.
- Offers prognostic insights, with Grade IV showing higher 5-year mortality than Grade III.
Abstract:
Hypertensive cardiomyopathies can be divided into 4 ascending categories according to the pathophysiologic and clinical impact of hypertension on the heart: Grade I. This category is characterized by LV diastolic dysfunction with no associated LV hypertrophy. Grade II. Patients at this stage present LV diastolic dysfunction with echocardiographic LV hypertrophy. Exercise capacity in terms of maximal oxygen consumption may be normal (Grade IIA) o impaired (Grade IIB). Grade III. This stage is distinguished by the presence of congestive heart failure (severe dyspnea and X-ray pulmonary edema with normal EF (> or = 50%). Patients having LV mass/volume ratio > 1.8 with little or no myocardial ischemia are classified as IIIA, as compared with IIIB patients having LV mass/volume ratio < 1.8 and significant myocardial ischemia. Clinically, these two subgroups can be distinguished as follows: the presence of a fourth sound and the absence of cardiomegaly for classification as IIIA, and a third sound plus cardiomegaly for classification as IIIB. Grade IV. Here the profile is one of dilated cardiomyopathy, LV hypertrophy and impaired EF (< 50%). The 5-year mortality rate is higher for Grade IV patients than for Grade III patients, although the morbility rate is similar in both.
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