Cardiac Arrhythmias

Exercise may decrease heart drug's effectiveness

Peter Ruben and his team of researchers have spent years studying why seemingly healthy patients with inherited cardiac arrhythmias can sometimes suddenly die during exercise. (2017, 2016, 2015) His past research has shown ...

Mar 08, 2018
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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
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Decoding the signals of the heart

There are currently an estimated 1.8 million people in Germany who have atrial fibrillation but do not know it. Now a Dutch company has developed an app with which a smartphone can be used to detect this dangerous cardiac ...

Feb 26, 2018
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Helping the heart to cope with stress

A new Junior Research Group at the Institute for Cardiovascular Prevention will focus on metabolic adaption of heart muscle cells to find new therapies for combating heart disease.

Feb 26, 2018
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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

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