Atrial Fibrillation

Smartphone ECG can detect atrial fibrillation

(HealthDay)—Smartphones could help improve detection and management of atrial fibrillation, researchers say. The findings were scheduled to be presented at the annual meeting of the Heart Rhythm Society, ...

May 18, 2015
popularity 5 comments 0

Atrial fibrillation (AF or A-fib) is the most common cardiac arrhythmia (irregular heart beat). It may cause no symptoms, but it is often associated with palpitations, fainting, chest pain, or congestive heart failure. AF increases the risk of stroke; the degree of stroke risk can be up to seven times that of the average population, depending on the presence of additional risk factors (such as high blood pressure). It may be identified clinically when taking a pulse, and the presence of AF can be confirmed with an electrocardiogram (ECG or EKG) which demonstrates the absence of P waves together with an irregular ventricular rate.

In AF, the normal regular electrical impulses generated by the sinoatrial node are overwhelmed by disorganized electrical impulses usually originating in the roots of the pulmonary veins, leading to irregular conduction of impulses to the ventricles which generate the heartbeat. AF may occur in episodes lasting from minutes to days ("paroxysmal"), or be permanent in nature. A number of medical conditions increases the risk of AF, particularly mitral stenosis (narrowing of the mitral valve of the heart).

Atrial fibrillation may be treated with medications to either slow the heart rate to a normal range ("rate control") or revert the heart rhythm back to normal ("rhythm control"). Synchronized electrical cardioversion can be used to convert AF to a normal heart rhythm. Surgical and catheter-based therapies may be used to prevent recurrence of AF in certain individuals. People with AF often take anticoagulants such as warfarin to protect them from stroke, depending on the calculated risk. The prevalence of AF in a population increases with age, with 8% of people over 80 having AF. Chronic AF leads to a small increase in the risk of death. A third of all strokes are caused by AF.

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

Latest Spotlight News

Subconscious learning shapes pain responses

In a new study led from Sweden's Karolinska Institutet, researchers report that people can be conditioned to associate images with particular pain responses – such as improved tolerance to pain – even ...

All sounds made equal in melancholy

The room is loud with chatter. Glasses clink. Soft music, perhaps light jazz or strings, fills the air. Amidst all of these background sounds, it can be difficult to understand what an adjacent person is ...

Faster heart rate linked to diabetes risk

An association between resting heart rate and diabetes suggests that heart rate measures could identify individuals with a higher future risk of diabetes, according to an international team of researchers.

Vortex device makes for better cancer treatments

A South Australian invention, responsible for unboiling an egg, has been used to produce a four-fold increase in efficacy of carboplatin, a commonly used drug for ovarian, lung and other cancer. ...