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Robust algorithm to locate heart beats from multiple physiological waveforms by individual signal detector voting
Alarm fatigue is a top medical device hazard in patient monitoring that could be reduced by merging physiological information from multiple sensors, minimizing the impact of a single sensor failing. We developed a heart beat detection algorithm that utilizes multi-modal physiological signals (e.g. electrocardiogram, blood pressure, stroke volume, photoplethysmogram and electro-encephalogram) by merging the heart beats obtained from signal-specific detectors. We used the PhysioNet/Computing in Cardiology Challenge 2014 training set to develop the algorithm, and we refined it with a mix of signals from the multiparamet...
Source: Physiological Measurement - July 28, 2015 Category: Physiology Authors: Loriano Galeotti, Christopher G Scully, Jose Vicente, Lars Johannesen and David G Strauss Source Type: research

Hacking The Nervous System
(Photo: © Job Boot) One nerve connects your vital organs, sensing and shaping your health. If we learn to control it, the future of medicine will be electric.When Maria Vrind, a former gymnast from Volendam in the Netherlands, found that the only way she could put her socks on in the morning was to lie on her back with her feet in the air, she had to accept that things had reached a crisis point. “I had become so stiff I couldn’t stand up,” she says. “It was a great shock because I’m such an active person.”It was 1993. Vrind was in her late 40s and working two jobs, athletics coach and a carer for disabled ...
Source: Healthy Living - The Huffington Post - May 30, 2015 Category: Consumer Health News Source Type: news

Could testing grip strength predict heart disease risk?
Conclusion These are interesting results from a range of very different countries, showing that people with low muscle strength may be at higher risk of dying prematurely than other people. Earlier studies in high-income countries had already suggested that this was the case, but this is the first study to show it holds true across countries from high to low incomes. The study also shows that Europeans, and men from high-income countries, on average, have higher grip strength than people from lower-income countries. Interestingly, women from middle-income regions, such as China and Latin America, had slightly higher muscl...
Source: NHS News Feed - May 14, 2015 Category: Consumer Health News Tags: Heart/lungs Medical practice Source Type: news

Pulse transit time measured by photoplethysmography improves the accuracy of heart rate as a surrogate measure of cardiac output, stroke volume and oxygen uptake in response to graded exercise
Heart rate (HR) is a valuable and widespread measure for physical training programs, although its description of conditioning is limited to the cardiac response to exercise. More comprehensive measures of exercise adaptation include cardiac output (Q̇), stroke volume (SV) and oxygen uptake (V̇O 2 ), but these physiological parameters can be measured only with cumbersome equipment installed in clinical settings. In this work, we explore the ability of pulse transit time (PTT) to represent a valuable pairing with HR for indirectly estimating Q̇, SV and V̇O 2 non-invasively. PTT was measured as the time interval bet...
Source: Physiological Measurement - April 9, 2015 Category: Physiology Authors: L Pollonini, N S Padhye, R Re, A Torricelli, R J Simpson and C C Dacso Source Type: research

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