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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Combo AF therapy may not lower risk of coronary events, thromboembolism

Antiplatelet therapy in addition to a vitamin K antagonist in patients with atrial fibrillation (AF) and stable coronary artery disease  may not lower the risk of recurrent coronary events or thromboembolism, according to a study published online Jan. 27 in Circulation. 

Judge allows Riata lawsuits to move forward

A federal judge ruled that five product liability claims against St. Jude Medical over its Riata defibrillator leads can move forward.

Repeat cryoablation may offer long-term freedom for some AF patients

About half of patients with paroxysmal atrial fibrillation (AF) who underwent cryoballoon-based pulmonary vein ablation in the STOP AF trial experienced early recurrences of AF. Within that early recurrence subset, those who chose repeat ablation were more likely to be AF-free at one year.

Evidence on efficacy of ICDs at preventing SCD mixed

Using implantable cardioverter-defibrillators (ICDs) to prevent sudden cardiac death (SCD) was more effective than not using ICDs at lowering the risk for mortality and SCD, a meta-analysis published online Jan. 21 in Annals of Internal Medicine found. However, evidence from multiple studies was too weak to suggest a mortality or SCD benefit among different subgroups. 

Medtronic Surescan(r) pacing systems first to be approved for full body MRI scans without positioning restrictions

Medtronic, Inc. (NYSE: MDT), today announced that the Medtronic SureScan(r) pacing systems - the first and only pacing systems in the United States that have been approved by the U.S. Food and Drug Administration (FDA) for use with magnetic resonance imaging (MRI) - are now approved for MRI scans positioned on any region of the body. Patients implanted with the Advisa DR MRI(r) or Revo MRI(r) SureScan pacing systems now can have MRI scans without positioning restrictions, including the chest area, which previously had been restricted.

Today’s CIEDs: A hodgepodge of PMA supplements?

Modifications in many of the cardiac implantable electronic devices (CIEDs) currently used in clinical practice were approved through processes that did not require new clinical data, a study published in the Jan. 22-29 issue of JAMA found.

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Antibiotics linked to warfarin over-anticoagulation

Antibiotics may increase the risk of excessive anticoagulation among patients with warfarin, according to a study published online Jan. 20 in JAMA Internal Medicine. The absolute risk, however, was low.

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Options when proper care & reimbursement don’t align

What options do physicians and hospitals have when reimbursement rules are out of sync with current clinical guidelines and appropriate use criteria? Cardiologists used implantable cardioverter-defibrillators (ICDs) to illustrate this disconnect in the Jan. 7-14 issue of 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.

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