Diseases, Conditions, Syndromes

China virus: What we know about the fatalities

The first fatality of China's new virus would come to represent a common set of traits for those who died to the disease: he was over the age of 60 and in poor health.

Cardiology

Technique reveals whether models of patient risk are accurate

After a patient has a heart attack or stroke, doctors often use risk models to help guide their treatment. These models can calculate a patient's risk of dying based on factors such as the patient's age, symptoms, and other ...

Cardiology

Belly fat linked with repeat heart attacks

Heart attack survivors who carry excess fat around their waist are at increased risk of another heart attack, according to research published today in the European Journal of Preventive Cardiology.

Cardiology

Bioengineering living heart valves

Researchers at Qatar University, in collaboration with Imperial College London, Biostage, Inc. in the U.S., and the American University of Beirut, Lebanon, have made progress developing living heart valves that can grow with ...

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Hypertension (HTN) or high blood pressure, sometimes arterial hypertension, is a chronic medical condition in which the blood pressure in the arteries is elevated. This requires the heart to work harder than normal to circulate blood through the blood vessels. Blood pressure involves two measurements, systolic and diastolic, which depend on whether the heart muscle is contracting (systole) or relaxed (diastole) between beats. Normal blood pressure is at or below 120/80 mmHg. High blood pressure is said to be present if it is persistently at or above 140/90 mmHg.

Hypertension is classified as either primary (essential) hypertension or secondary hypertension; about 90–95% of cases are categorized as "primary hypertension" which means high blood pressure with no obvious underlying medical cause. The remaining 5–10% of cases (secondary hypertension) are caused by other conditions that affect the kidneys, arteries, heart or endocrine system.

Hypertension is a major risk factor for stroke, myocardial infarction (heart attacks), heart failure, aneurysms of the arteries (e.g. aortic aneurysm), peripheral arterial disease and is a cause of chronic kidney disease. Even moderate elevation of arterial blood pressure is associated with a shortened life expectancy. Dietary and lifestyle changes can improve blood pressure control and decrease the risk of associated health complications, although drug treatment is often necessary in patients for whom lifestyle changes prove ineffective or insufficient.

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