Cardiac Arrhythmias

Woodchucks and sudden cardiac death

How much calcium could a hibernating woodchuck's heart cells sequester, if a hibernating woodchuck's heart cells could sequester calcium? More than enough, it turns out, to protect the animals from cardiac arrhythmias – ...

Feb 23, 2012
popularity0 comments 0

Predicting arrhythmias so as to prevent them

Researchers have discovered how to predict some cardiac arrhythmias several steps before they even occur. It's a finding that could lead to an improved cardiac device, with equipment designed to detect when arrhythmias are ...

Sep 28, 2015
popularity10 comments 0

A virtual heart to simulate arrhythmia

A group of researchers from MIPT and Ghent University (Belgium) has developed the first realistic model of the complex cardiac microstructure. The researchers hope that the model will elucidate the causes of fibrosis, which ...

Sep 07, 2017
popularity3 comments 0

Nanotechnology could spur new heart treatment

A new nanoparticle developed by University of Michigan researchers could be the key to a targeted therapy for cardiac arrhythmia, a condition that causes the heart to beat erratically and can lead to heart attack and stroke.

Oct 29, 2015
popularity171 comments 0

Using antibiotics to help heart problems

A research team from the University of Bristol is looking at whether an antibiotic has the potential to prevent or treat irregular heartbeats brought on by other medicines, thanks to a grant from national charity Heart Research ...

Sep 11, 2014
popularity0 comments 0

Cardiac dysrhythmia (also known as arrhythmia and irregular heartbeat) is any of a large and heterogeneous group of conditions in which there is abnormal electrical activity in the heart. The heart beat may be too fast or too slow, and may be regular or irregular.

Some arrhythmias are life-threatening medical emergencies that can result in cardiac arrest. Others cause symptoms such as an abnormal awareness of heart beat (palpitations), and may be merely annoying. These palpitations have also been known to be caused by atrial/ventricular fibrillation, wire faults, and other technical or mechanical issues in cardiac pacemakers/defibrillators. Still others may not be associated with any symptoms at all, but may predispose the patient to potentially life threatening stroke or embolism.

Some arrhythmias are very minor and can be regarded as normal variants. In fact, most people will on occasion feel their heart skip a beat, or give an occasional extra strong beat; neither of these is usually a cause for alarm.

Proarrhythmia is a new or more frequent occurrence of pre-existing arrhythmias, paradoxically precipitated by antiarrhythmic therapy, which means it is a side effect associated with the administration of some existing antiarrhythmic drugs, as well as drugs for other indications. In other words, it is a tendency of antiarrhythmic drugs to facilitate emergence of new arrhythmias.

The term sinus arrhythmia refers to a normal phenomenon of mild acceleration and slowing of the heart rate that occurs with breathing in and out. It is usually quite pronounced in children, and steadily decreases with age. This can also be present during meditation breathing exercises that involve deep inhaling and breath holding patterns.

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

Latest Spotlight News

Brain changes found in self-injuring teen girls

The brains of teenage girls who engage in serious forms of self-harm, including cutting, show features similar to those seen in adults with borderline personality disorder, a severe and hard-to-treat mental illness, a new ...

Probiotics increase bone volume in healthy mice

A widely-used probiotic stimulates bone formation in young female mice, according to a study published November 13th in the journal Immunity. In response to treatment with Lactobacillus rhamnosus GG (LGG), other intestinal ...

Pancreatic cancer's addiction could be its end

Cancer cells are often described as cells "gone bad" or "renegade." New research reveals that in some of the deadliest cases of pancreatic cancer, these rebellious cells have an unexpected addiction. Now, scientists are investigating ...