Cladellas et al. concern patients who failed to achieve an adequate heart rate response; it is not clear whether heart rate decrease occurred in any patient. As we reported, only 1 of 14 patients with paradoxical sinus deceleration was taking beta-blockers. We mentioned in our report that all our patients fasted for at least 3 h before dobutamine stress echocardiography; mild hypovolemia may ha...

OBJECTIVES/HYPOTHESIS During phonation, skewing of the glottal flow waveform (Q) refers to a phenomenon that occurs when the flow decelerates more rapidly than it accelerates. This skewing is clinically important because it increases the glottal efficiency, which is defined by the acoustic intensity (sound pressure level) divided by the subglottal pressure. Current theoretical models predict th...

1. Miller TD, Gibbons RJ. Paradoxical heart rate deceleration during exercise: relationship to a mid-right coronary artery stenosis. Chest 1988; 94: 407-08. 2. Takeuchi M, Hanada H, Numata T. İs dobutamine induced sinus node deceleration a marker of significant stenosis of the right coronary artery? Chest 1998; 113: 306-11. 3. Gündüz R, Payzın S, Kayıkçıoğlu M, Hasdemir C. Sinus node decelerati...

A family of new heart rate asymmetry measures is introduced, namely deceleration and acceleration runs, as well as entropic measures summarizing their distribution. We introduce the theoretical run distribution for shuffled data and use it as a reference for interpreting the results. The measures defined in the paper are applied to actual 24 h Holter ECG recordings from 87 healthy people, and i...

The brain's ability to synchronize movements with external cues is used daily, yet neuroscience is far from a full understanding of the brain mechanisms that facilitate and set behavioral limits on these sequential performances. This functional magnetic resonance imaging (fMRI) study was designed to help understand the neural basis of behavioral performance differences on a synchronizing moveme...

the present study aimed to assess changes in resting and maximum heart rates as primary indicators of cardiac autonomic function in metabolic syndrome (mets) patients and to determine their value for discriminating mets from non-mets. 468 participants were enrolled in this cross-sectional study and assessed according to the updated adult treatment panel iii (atp-iii) definition of mets. resting...