The self-discharge hea t losses of cardiac pacemaker power ce ll s and pacemakers were in ves ti gated by microcalo rimetry. Results were ob ta ined with small alkaline, mercury and lithium-iodine batte ries under opencircuit and external load conditions to monitor their heat loss characteri st ics and to ga ther information on the self-discharge mechan ism. Results ob tai ned with "complete pa...

Introduction As of today, the use of MRI procedures on patients with implanted cardiac pacemakers is prohibited due to safety issues. The implants can interact with the RF fields of the MRI device. The most hazardous effect is heating at the tip of the lead, less dangerous are sensing errors and malfunctions of the devices, because they disappear completely after the procedure. The majority of ...

Cardiac pacemakers are vital for many persons sufferering from heart diseases, and a malfunction of those devices can have severe consequences for their wearers. Yet, in a signal environment evermore complex, the influence of external signals interfering with the normal operation of a pacemaker is getting stronger. We present an nonlinear analytical model of a pacemaker and use it to investigte...

A deceased 79 year old man with a permanent cardiac pacemaker was due to be cremated, but the pacemaker generator was not detectable by palpation. A hand held metal detector to locate the device so that it could be extracted before cremation.

Cardiovascular diseases are a major health concern all over the world and, especially, heart failure has gained more importance in the recent years. Improving diagnosis and therapy is therefore critical and among the several resources at our disposal, implantable devices is expected to have a better rate of success. This paper is focused on two topics: (i) our views of the main challenges to fa...

Gravitational waves propagating through a stationary gauge field transform into gauge field waves and back again. When multiple families of flavor-space locked gauge fields are present, the gravitational and gauge field waves exhibit novel dynamics. At high frequencies, the system behaves like coupled oscillators in which the gravitational wave is the central pacemaker. Due to energy conservati...

Wireless capsule endoscopy is a new endoscopic tool for the diagnosis and management of small bowel diseases. The main indication at present is the evaluation of GI bleeding of obscure origin, Crohn’s disease, coeliac disease and small bowel tumors. Studies suggest that capsule endoscopy is associated with few adverse events. Whether cardiac pacemaker may interfere with capsule endoscopy is sti...

In 2014, about 26 million people were suffering from heart failure. Symptomatic heart failure is treated by cardiac resynchronization therapy. However, 30 % to 50 % do not clinically respond after the implantation of a biventricular pacemaker. To improve the success rate, the quantification of a patient’s scar burden is very important. Lategadolinium-enhanced magnetic resonance imaging is used ...

The electrical interaction between the heart and an artificial pacemaker is often complex. Because of the sophistication and variability of dual-chamber device algorithms, even experienced cardiologists have difficulty interpreting paced electrocardiograms (ECGs). To study heart-pacemaker interaction (HPI), a computer model of the cardiac conduction system has been developed which includes the ...

UNLABELLED Aberrant waveform during artificial pacing increases secretion of natriuretic peptides, mainly B-type natriuretic peptide (BNP). The aim of the study was to investigate whether renal function is modified through increased BNP secretion during artificial pacing. MATERIAL AND METHODS A total of 117 patients with pacemaker implanted were included (pacing mode: AAI/R - 21, DDD/R - 59, ...