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  • cardiac
  • Impedance sensing in the left heart also provides timing of mechanical contraction, and the pacemaker controls pacing to maintain bi-ventricular mechanical synchronization adjusted for maximum cardiac output. (google.co.uk)
  • Allen DG, Xiao X-H (2003) Role of the cardiac Na+/H+ exchanger during ischemia and reperfusion. (springer.com)
  • A rate adaptive cardiac pacer is described in which the impedance versus time information derived using impedance plethysmography or the pressure versus time information derived from a pressure transducer in a ventricular chamber is signal processed to recover a modulating envelope due to volume or pressure changes occasioned by respiratory activity. (google.com)
  • detect
  • 10. The system of claim 2 , further comprising an activity detector, coupled to the measurement timer, to detect a physical activity level and issue a permission signal allowing the measurement timer to start timing each of the predetermined measurement sessions when the physical activity level is below a predetermined activity level. (google.com)
  • Impedance
  • Either or both of the respiratory interval or respiratory depth may be combined in an appropriate rate control algorithm with other parameters also derived from the impedance versus time signal to develop a rate control signal for an implanted pacer. (google.com)
  • vascular
  • Diabetes is also associated with LV remodeling and fibrosis resulting in myocardial (and vascular) stiffness, thereby increasing the propensity of diastolic dysfunction or heart failure with preserved ejection fraction (HFpEF). (renalandurologynews.com)
  • injury
  • Endpoints consisted of electrocardiographic, biochemical, and histologic markers of myocardial injury/ischemia. (bmj.com)
  • 2 3 In an effort to improve outcomes, as well as broaden the clinical applications of REBOA, there has been substantial interest in performing REBOA closer to the point of injury, 4 5 and for prolonged durations, 6 to mitigate extended transport time or facilitate interhospital transfer. (bmj.com)
  • We suggest that these recovery parameters could be utilized as an index of tissue injury and severity of ischemia. (rsc.org)
  • sensor
  • Because of the difficulty in obtaining a reliable sensor which would not drift with time, the Alcidi device never became commercially successful. (google.com)
  • Conclusions
  • Conclusions In patients with significant LAD disease, RTMCE during DSE detects subendocardial ischemia even when transmural WT appears normal. (onlinejacc.org)
  • implantable
  • 3. The implantable stimulation device of claim 2 , wherein the orthostatic compensation pacing rate comprises increasing the pacing rate to approximately 80-100 beats per minute and slowly decreasing the rate over a time period. (google.com)
  • an implantable medical device including at least the ischemia detector, the pulse output circuit, and the control circuit. (google.com)
  • stroke
  • The stroke team will be available to anyone at the medical center to evaluate and treat suspected brain ischemia. (stanford.edu)
  • indicative
  • This acceleration signal is integrated over time once to provide a contractility parameter, which is indicative of the contractility of the heart and is integrated over time twice to provide a displacement parameter, which is indicative of the displacement of the heart wall during the heartbeat. (google.com)
  • practice
  • Individual members of the Standards of Practice Committee dedicate the vast majority of professional time to diagnostic and interventional practice and the joint committee includes representatives from radiology, neurosurgery, interventional radiology and interventional neuroradiology, a diverse constituency expert on the subject matter under consideration. (ajnr.org)
  • mechanical
  • The WT was visually assessed by a blinded reviewer at 2 time periods: initially after a high mechanical index impulse before myocardial contrast replenishment (MCR), and again during MCR. (onlinejacc.org)
  • real time
  • The subcutaneous ECG channel allows the device to, in real time and independent of the standard pacing and sensing circuitry, verify the presence of pacing spikes, chamber senses, and other device outputs and hence establish and verify device integrity. (google.ca)
  • Click on image to view source article Editor's Note: We have all revisted this pathway intensively throughout our careers, and of course, we have all been clinically challenged by open-heart cases that test our fundamental understanding of coagulation theory in real time, at a level that certainly reflects a fairly deep dive into esoteric hematology. (perfusion.com)
  • Imaging
  • This work shows that serial pain tasks can be used for functional magnetic resonance imaging studies using electrical nerve stimulation as a stimulus, as long as sufficient time is allowed between the two tasks. (osu.edu)
  • heart
  • a heart sound analyzer coupled to the beat counter and the heart sound counter, the heart sound analyzer including a ratio calculator to calculate an S3 index being a ratio of a number of the S3 beats counted during a predetermined time period to the number of the heart beats counted during the predetermined time period. (google.com)
  • His-Purkinje system is made of myocardial cells specialized for electrical conduction, hence no neurons are involved in propagation of electrical impulses in the heart. (medgadget.com)
  • correlation
  • Importantly, there was a significant inverse correlation between the level of ROS accumulation during ischemia and the latency until which the cell underwent ΔΨ m loss (r=−0.89). (ahajournals.org)
  • effects
  • This study was performed to determine the early and delayed metabolic effects of myocardial ischemia on the major membrane phospholipids and to reassess the potential role of lysophospholipids in the genesis of malignant dysrhythmias induced by ischemia. (ahajournals.org)
  • signal
  • a presentation device configured to produce at least one of an alarm signal and a warning message when the ischemia alert signal is received. (google.com)
  • One study involves brain activation caused by pain and the signal attenuation over time within activated areas of the brain. (osu.edu)
  • The amount and duration of pain signal attenuation over time was examined. (osu.edu)