Engineering

'Smart' pajamas could monitor and help improve sleep

If you've ever dreamed about getting a good night's sleep, your answer may someday lie in data generated by your sleepwear. Researchers have developed pajamas embedded with self-powered sensors that provide unobtrusive and ...

Consumer & Gadgets

Apple Watch may spot heart problem but more research needed

A huge study suggests the Apple Watch can detect a worrisome irregular heartbeat at least sometimes—but experts say more work is needed to tell if using wearable technology to screen for heart problems really helps.

Hi Tech & Innovation

Apple has designs on blood pressure management system

Counting calories or how many steps you will need to take to work off a wedding feast are not the only features of fitness monitoring. Patients today may be asked to check their blood pressure at home and will be interested ...

Hypertension

Hypertension, also referred to as high blood pressure, HTN or HPN, is a medical condition in which the blood pressure is chronically elevated. In current usage, the word "hypertension" without a qualifier normally refers to systemic, arterial hypertension.

Hypertension can be classified as either essential (primary) or secondary. Essential hypertension indicates that no specific medical cause can be found to explain a patient's condition. About 90-95% of hypertension is essential hypertension. Secondary hypertension indicates that the high blood pressure is a result of (i.e., secondary to) another condition, such as kidney disease or tumours (adrenal adenoma or pheochromocytoma).

Persistent hypertension is one of the risk factors for strokes, heart attacks, heart failure and arterial aneurysm, and is a leading cause of chronic renal failure. Even moderate elevation of arterial blood pressure leads to shortened life expectancy. At severely high pressures, defined as mean arterial pressures 50% or more above average, a person can expect to live no more than a few years unless appropriately treated. Beginning at a systolic pressure (which is peak pressure in the arteries, which occurs near the end of the cardiac cycle when the ventricles are contracting) of 115 mmHg and diastolic pressure (which is minimum pressure in the arteries, which occurs near the beginning of the cardiac cycle when the ventricles are filled with blood) of 75 mmHg (commonly written as 115/75 mmHg), cardiovascular disease (CVD) risk doubles for each increment of 20/10 mmHg.

This text uses material from Wikipedia, licensed under CC BY-SA