Cardiac Arrhythmias

Can your cardiac device be hacked?

Medical devices, including cardiovascular implantable electronic devices could be at risk for hacking. In a paper publishing online today in the Journal of the American College of Cardiology, the American College of Cardiology's ...

Feb 20, 2018
popularity34 comments 0

Five things to know about coughing kids

Parents know the drill. First comes the sniffles, followed by congestion—and then finally, a persistent, hacking cough. And that cough can drag out for weeks, long after the other upper-respiratory symptoms clear up. Why ...

Dec 22, 2017
popularity35 comments 1

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

Air pollutants linked to abnormal fetal growth

Chinese mothers who were exposed to a high level of certain air pollutants during pregnancy had a higher risk of abnormal fetal growth, according to a new Yale School of Public Health (YSPH) study.

Glaucoma study finds brain fights to preserve vision

A team of researchers, led by David Calkins, Ph.D., vice chair and director of Research at the Vanderbilt Eye Institute, has made a breakthrough discovery in the field of glaucoma showing new hopes for treatments to preserve ...

Looking for the origins of schizophrenia

Schizophrenia may be related to neurodevelopmental changes, including brain's inability to generate an appropriate vascular system, according to new study resulted from a partnership between the D"Or Institute for Research ...