cardiac ion channels and heart rate and rhythm

... the excitatory cationic channels, including the acetylcholine and serotonin receptors, and the inhibitory anionic channels, including the GABA, glycine and invertebrate histamine and glutamate receptors ... residue involved in ion selectivity in anionic channels is shaded green and the glutamate residue involved in ion selectivity in cationic channels is shaded purple Species abbreviations are as follows: ... propagation of signals along neuronal processes and the transmission of signals from neurons or receptor cells to their targets is mediated by the action of ion channels The neuronal ligand- or...

Ngày tải lên: 14/08/2014, 14:21

... and fetal 1heart rate rhythms (36 – 40 weeks gestation) Hourly layout for 24-hour period frequencies of maternal Hourly layout for 24-hour period frequencies of maternal and fetal heart rate rhythms ... investigated 24-hour heart rate rhythms of the mother and the fetus using single auscultations of maternal heart rate and pulse with 2-hour intervals throughout 24 hours N.N Konstantinova [10] and Hoppenbrowers ... 1980– 1986); and Determination of the time of onset and formation of fetal biological rhythms (Research works 1989–1993) http://www.jcircadianrhythms.com/content/3/1/5 maternal and fetal heart beat...

Ngày tải lên: 10/08/2014, 09:20

... and serve as antioxidants and anti-inflammatory agents [12, 13] as well as hepatoprotectants [14] and neuroprotectants [15] However, the effects of naringin and hesperidin on metabolic rate and ... effects of p-synephrine alone and in combination with different amounts of hesperidin and naringin on: (1) resting metabolism, (2) blood pressure, (3) resting heart- rate, and (4) self-reported mood/energy ... pressure, resting heart- rate and self-ratings in the four treatment groups involving p-synephrine, naringin and hesperidin relative to the placebo group is very positive, and in conjunction with the...

Ngày tải lên: 25/10/2012, 11:04

... (VO2) and carbon dioxide production (VCO2) The non-protein respiratory exchange ratio (RER) value was calculated from VO2 and VCO2 The RER was used as an index of fat and carbohydrate oxidation Heart ... then collected and analyzed during the next 10 of the session Heart rate and blood pressure were recorded at the end of expired air collection, approximately 72-75 after capsule ingestion Three analyses ... cardiovascular effects of C aurantium extract in combination with caffeine, and various authors make the assumption that an increase in heart rate and blood pressure are to be expected [8, 10, 16-19]...

Ngày tải lên: 25/10/2012, 11:10

... with and extend previous observations suggesting that PTHs form cationselective ion channels, and in particular with data obtained with b-PTH showing the formation of cationselective ion channels ... Marion ´ D, Riquelme G, Molgo J & Benoit E (2004) Neuronal and muscular alterations caused by two wheat endosperm proteins, puroindoline-a and alpha1-purothionin, are due to ion pore formation ... Discussion In this work, the ion channels formed by PIN-a and a1-PTH reconstituted into giant liposomes were characterized, and their toxicity examined in murine isolated neuromuscular preparations...

Ngày tải lên: 07/03/2014, 12:20

... Abe K, Yambe T, Nitta S: Quantification of emotional reaction based on cross-correlation between pulse wave transmission time and heart rate in the Mayer wave-band J Japan Circ Cont in Med 2004, ... motion sickness stimulation Aviat Space Environ Med 1990, 61(5):399-405 Holmes SR, Griffin MJ: Correlation between heart rate and the severity of motion sickness caused by optokinetic stimulation ... heart rate and blood pressure [12-14] A previous study [14] showed that the physiological index, ρmax, defined as the maximum cross-correlation coefficient between heart rate and blood pressure and...

Ngày tải lên: 19/06/2014, 10:20

... Childhood None Occasionally Childhood Occasionally None Occasionally None None None None Occasionally Occasionally Childhood Occasionally Occasionally None Occasionally Occasionally + + + + + + ... condition and the 3500-ms interval condition (p < 0.05) LF/HF ratio as a function of observation time In this section, we discuss the activity of the autonomic nervous systems of subjects and how ... F F Everyday Occasionally None Everyday None None Occasionally None None Occasionally Occasionally None None Occasionally Everyday None Occasionally None Everyday None Occasionally Childhood...

Ngày tải lên: 19/06/2014, 10:20

... Workers' heart rate (HR), Pearson's correlation (r), Cohen's Kappa (k), percentage of the heart rate range (%HRR), energy expenditure (E), the rate of perceived exertion (RPE, scale 6–20), and work ... citation purposes) Journal of Occupational Medicine and Toxicology 2006, 1:20 left hand right hand 500 R2 = 0,7665 Days 350 300 R2 = 0,3725 left hand right hand 200 2 R = 0,0253 14 left hand right ... activity (intensity) was estimated by heart rate monitoring (HRM) The measurement was based on heart rate (HR) variation, which correlates with oxygen consumption and allows quantifying the objective...

Ngày tải lên: 20/06/2014, 00:20

... Jorgen FH: Increased heart rate and reduced heart- rate variability are associated with subclinical inflammation in middleaged and elderly subjects with no apparent heart disease Eur Heart J 2004, 25:363-370 ... dysfunction [14] Unfortunately, the cross sectional nature of the present study does not allow the evaluation of a causal association between autonomic dysfunction and IR and the elucidation of ... exercise test and HRR evaluation PCOS women underwent a symptom-limited CPX with Bruce treadmill protocol [6] Heart rate (HR) and blood pressure (BP) at baseline and peak exercise, heart rate minute...

Ngày tải lên: 20/06/2014, 07:20

... heart rate for the salvo-episode set is much lower than the heart rate for the periodic- and sporadic-episode sets, but for all three sets, and not just for the salvo-episode set, the heart rate ... average heart rates for salvo- and sporadic-episode sets indicate that the ischemia in both groups might be triggered by different mechanisms In addition, the significant change in heart rate before and ... salvo-episode set have generally lower heart rate and standard deviation compared to the records in the sporadic-episode set We also observed a notable increase of the heart rate prior to ischemia onset...

Ngày tải lên: 22/06/2014, 20:20

... tsunami survivors [8] and had seven years of experience in using a polygraph to record heart rate variability and respiration (i) Autonomic and respiratory variables Heart rate variability was ... of Cardiology and the North American Society of Pacing and Electrophysiology: Heart rate variability standards of measurement, physiological interpretation and clinical use Circulation 1996, 93:1043-1065 ... them and hence were not added The absence of change in the heart rate variability may be related to the yoga program and the yoga breathing techniques in particular The breath rate and heart...

Ngày tải lên: 11/08/2014, 16:22

... changes in heart rate and food intake in reindeer (Rangifer tarandus tarandus) Acta Physiol Scand 2000, 170, 145-151 Moen AN: Seasonal changes in heart rates, activity, metabolism, and forage ... box-plot presentation shows the standard median, and 10, 25, 75 and 90 percentiles The square plot presents the average and the outermost plots and 99 percentiles, and minimum and maximum values, ... observed between the generated pulse rate and the PVNV values, indicating a gradual adaptation to changes in generated pulse rate PVNV adjusts to changes in the pulse rate in about s but the lag...

Ngày tải lên: 12/08/2014, 15:20

... problems with lactation and took good care of their puppies The heart rate changed in relation to reproductive period and time of day (Table and Fig 1) In all dogs the heart rate increased in the ... a.m.-12:00 p.m.) heart rates decreased with the course of gestation, they were higher than nighttime (12:00 p.m.-6:00 a.m.) rates for all periods (p

Ngày tải lên: 12/08/2014, 15:20

... Organization of a pediatric/congenital cardiac catheterization laboratory, Medications used in or in conjunction with the cardiac catheterization laboratory and patient preparation for cardiac ... premedication Most premedication and “sedation Medications and patient preparation combinations” used in the laboratory include both a sedative and an analgesic Often an anxiolytic medication is ... compressed air and suction The holding area must have a separate “crash cart” including emergency cardiac medications, intubation and temporary ventilation equipment as well as a cardiac defibrillator...

Ngày tải lên: 13/08/2014, 12:20

... particular position, and the puncture technique and location are always adjusted for the particular rotation of the legs Any unusual or different positions of the legs and/ or rotation of the feet/legs, ... connecting and flush/pressure tubing, “manifolds” (which include stopcocks and pressure transducers), and the catheterization “trays” or “packs” for the catheterization table Cardiac catheterization ... radiation screens, etc.) and occasional other items which are unique to a particular catheterization laboratory In modern cardiac catheterization laboratories, all of these items are disposable and...

Ngày tải lên: 13/08/2014, 12:20

... Complications of catheter manipulations There are a very few complications that are a consequence of the manipulation alone of standard catheters Certainly, direct perforation of a vascular and/ or cardiac ... inversion When a catheter manipulation does result in multiple ectopic beats, the manipulation is stopped and/ or changed to allow the heart rhythm to stabilize The appropriate medications and a ... Perforation of cardiac structures and/ or vessels occurs more commonly during the manipulation of wires separately and/ or within catheters than with the manipulation of catheters alone Perforations...

Ngày tải lên: 13/08/2014, 12:20

... properly functioning transducers and properly prepared and flushed fluid lines and connections, the two separate pressure tracings from the two separate catheters positioned in the same location and displayed ... of flow and cardiac output along with these calculations is covered later under “Calculations” in this chapter Flow, cardiac output and intravascular shunt determination The detection and quantitating ... determination of flow in the cardiac catheterization laboratory, are based on the principals of indicator dilution techniques2 Indicator dilution techniques depend upon the detection and quantification...

Ngày tải lên: 13/08/2014, 12:20

... the heart As such, they serve no positive function and at the same time act as a source of thrombi, mechanical irritation to the heart and heart valves, and act as a nidus for bacterial growth and ... the dilation of valvular and large vessel lesions have come from pediatric interventionalists treating congenital heart lesions3 Equipment for balloon dilation in congenital heart lesions Balloons ... dilation procedure In central and common vascular channels, the total cardiac flow is obstructed and the duration of the inflation becomes very critical, so the time of the inflation/deflation must...

Ngày tải lên: 13/08/2014, 12:20

... the infant and child, a “conservative” dilation of both native and re/residual coarctation should be the primary approach to these lesions Complications specific to coarctation dilation The majority ... the years and the reduction in the complications and the difficulties with repeat surgery on patients with re/residual coarctation have made dilation of native and re/residual coarctation the procedure ... “marks” positioned in a location immediately behind the cardiac silhouette and adjacent to the aortic valve and, in that position, used as an accurate reference system for calibration Some X-ray...

Ngày tải lên: 13/08/2014, 12:20

... wire and through a pre-positioned sheath The delivery of the stent/balloon combination to the lesion, over a pre-positioned stiff wire and through a prepositioned long sheath, is the original and ... combination all fixed together in precisely the same relationship while the combination is advanced through the vascular system and heart The introduction and advancing of this combination requires ... and stent are positioned precisely over the exact lesion at the beginning of, and maintained in that position throughout, the expansion of the stent during its implant With a stent properly and...

Ngày tải lên: 13/08/2014, 12:20