Heart Rhythm

Hearts should have normal rhythm to their beats, but when these beats are out of synch, it causes inefficient pumping of blood. Irregular heart arrhythmias occur when the electrical signals that coordinate the heart's beats do not work properly. This can cause beats that are too fast (tachycardia), or too slow (bradycardia). Tachycardias include atrial fibrillation (AFib), supraventricular tachycardia, ventricular fibrillation, and ventricular tachycardia (VT). Bradycardias include sick sinus syndrome and conduction block. Electrophysiology arrhythmia treatments include medications, life style changes, and the EP lab interventions of catheter ablation, and implantable pacemakers or defibrillators.

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AFib patients most likely to discontinue dabigatran during first 6 months of treatment

Nearly three-quarters of atrial fibrillation patients taking dabigatran remain adherent to the medication two years after filling their first prescription, while just over 25% discontinue the drug for various reasons, according to an analysis published in the American Journal of Cardiology.

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Mechanical CPR gaining popularity despite lack of evidence

The U.S. is seeing an uptick in the use of mechanical resuscitation devices despite a paucity of evidence that the digitized CPR tools are effective, researchers reported in JAMA Network Open this fall.

Defibrillation testing losing ground as a safety check for ICDs

A cross-sectional study of heart patients undergoing ICD implantation revealed a marked decline in the use of defibrillation testing over time in the U.S., suggesting the precaution might be losing its value as a clinical tool.

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Early mortality ‘a very real complication’ after catheter ablation of AFib

A study of patients undergoing catheter ablation of atrial fibrillation between 2010 and 2015 found that early post-ablation mortality rates increased over the half-decade, reaching 1.35% per quarter by the end of the research period.

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Machine learning improves patient selection for CRT

A novel machine learning algorithm improved patient selection for CRT in a study of nearly 1,000 heart failure patients, representing an opportunity to optimize care and spare certain individuals from a pricey procedure that might not benefit them.

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1 in 5 patients prescribed opioids after CIED procedures

Short-term opioid prescriptions could have long-term consequences for heart patients with cardiac implantable electronic devices, according to work published in Heart Rhythm Oct. 21.

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BMS-Pfizer, Fitbit partner to improve AFib detection in people at risk for stroke

The Bristol-Myers Squibb-Pfizer Alliance and Fitbit on Oct. 17 announced they’d be partnering to improve timely diagnosis of atrial fibrillation in people at an increased risk of stroke.

Implantable monitor alerts patients to asymptomatic ACS

An implantable cardiac monitor designed to alert patients with coronary artery disease to progressive, abnormal ST-segment shifts could expedite transport to the ED and reduce treatment delays during acute coronary syndromes, according to work published in the Journal of the American College of Cardiology.

Around the web

Ron Blankstein, MD, professor of radiology, Harvard Medical School, explains the use of artificial intelligence to detect heart disease in non-cardiac CT exams.

Eleven medical societies have signed on to a consensus statement aimed at standardizing imaging for suspected cardiovascular infections.