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Topic: Normal sinus rhythm

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	[No title] (Site not responding. Last check: 2007-10-11)
		In one embodiment, the normal sinus rhythm template is derived from the timing differences between at a first feature point on a first signal of a cardiac complex and a second feature point on a second signal of the cardiac complex.
		In one embodiment, the characteristic of the sensed cardiac signal is the slope of a predetermined portion of the cardiac signal.
		In one embodiment, at 928 morphology of the far-field signals and/or the near-field signals of the unknown cardiac complex are compared to a representative normal sinus rhythm complex in a comparison window to determine whether the unknown cardiac complex is a VT complex or a SVT complex.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=00/47275.000817&ELEMENT_SET=DECL (13511 words)

	Sinustachycardia
		The rhythm is similar to normal sinus rhythm with the exception that the RR interval is shorter, less than 0.6 seconds.
		Sinus tachycardia may be accompanied by a decrease in stroke volume because the ventricles do not have enough time to fill (after atrial systole) before ventricular contraction..
		Sinus tachycardia results from increased automaticity of the SA node, for instance, due to increased sympathetic stimulation of the heart, fever or cardiac toxicity.
	sprojects.mmi.mcgill.ca /cardiophysio/sinustachycardia.htm (164 words)

	NurseWeek \| HealthWeek (Site not responding. Last check: 2007-10-11)
		Chapter 3: Rhythms of the SA Node and Atria
		A breakdown of this strip reveals a rhythm that is regular with a P wave present for every QRS complex.
		The R to R interval is regular, assuring you that the ventricle is firing at a regular rate.
	nurse.cyberchalk.com /nurse/courses/nurseweek/nw1120/c3/p1.htm (161 words)

	sinusbrady
		Sinus bradycardia occurs when the hearts rate is slower than 60 beats per minute.
		The sinus bradycardia rhythm is similar to normal sinus rhythm, except that the RR interval is longer.
		If the SA node is unable to properly function due to sick sinus syndrome, the AV node (or ventricular tissue if the AV node is also not functioning) take over the initiation of the heart beat, but at a rate that is slower than the sinus rhythm.
	sprojects.mmi.mcgill.ca /cardiophysio/sinusbrady.htm (310 words)

	New Page
		Normal rhythm, called sinus rhythm, is paced from the sinoatrial (SA) node.
		Sinus rhythm faster than 100 beats per minute is called sinus tachycardia; slower than 60 is called sinus bradycardia.
		The normal P wave should be upright in all leads except R. If the QRS is preceded by an abnormally-oriented P wave (often with a shortened PR interval) this indicates an ectopic atrial pacemaker.
	www.madsci.com /manu/ekg_rhy.htm (2011 words)

	Adenocard Injection Drug Information Adenocard Injection
		A cumulative 60% of patients with paroxysmal supraventricular tachycardia had converted to normal sinus rhythm within one minute after an intravenous bolus dose of 6 mg Adenocard (some converted on 3 mg and failures were given 6 mg), and a cumulative 92% converted after a bolus dose of 12 mg.
		Sinus node disease, such as sick sinus syndrome or symptomatic bradycardia (except in patients with a functioning artificial pacemaker).
		This process should continue until sinus rhythm is established or a maximum single dose of 0.3 mg/kg is used.
	www.drugs.com /PDR/Adenocard_Injection.html (2231 words)

	UpToDate Patient information: Atrial fibrillation
		Normally, the electrical impulses arise from an area of specialized cells called the sinus node or normal pacemaker, located in the right atrium or upper right chamber of the heart.
		Contrary to expectations, rhythm control was associated with a trend toward a higher risk of stroke compared to rate control; the majority of strokes occurred in patients receiving no or suboptimal warfarin therapy.
		Likelihood of spontaneous conversion of atrial fibrillation to sinus rhythm.
	patients.uptodate.com /topic.asp?file=hrt_dis/4882 (3815 words)

	Method and apparatus for correcting abnormal cardiac activity by low energy shocks - Patent 4559946
		Normal heart rhythm (sometimes called "sinus rhythm") originates in the sino-atrial (SA) node of the heart.
		Disorders of heart rhythm are called arrhythmias, and may arise in either the atria or the ventricles.
		2 is a schematic representation of the electrical activity of a heart going from sinus rhythm to ventricular fibrillation, showing the effect of the present invention to return the heart to normal sinus rhythm.
	www.freepatentsonline.com /4559946.html (4849 words)

	Re: atrial fibrillation
		i am in normal sinus rhythm at least 80% of the time sometimes in nsr a week at a time before a short episode of atrial fib then back to nsr.
		A disorder of heart rate and rhythm in which the upper heart chambers (atria) are stimulated to contract in a very rapid and/or disorganized manner; this usually also affects contraction of the ventricles.
		Normally, the atria and ventricles contract in a coordinated manner.
	www.medhelp.org /forums/cardio/archive/6993.html (1132 words)

	Bidirectional pacemaker - Patent 4452248
		The impulses which are generated in the sinus (SA) node pass through the atrial muscle to the AV node on its way to the ventricular muscle.
		If the sinus rate exceeds a given value of, for example, 95 heartbeats per minute, the pacemaker generates ventricular pulses S.sub.v which appear in synchronism with the atrial signal from the heart itself but at a given shortened AV delay interval, as shown in FIG.
		On the assumption that the sinus rate is higher than a given maximum value, for example, 160 beats per minute, a ventricular pulse S.sub.v is emitted in synchronism with the atrium, with shortened AV delay, and at a ratio of one for every two beats.
	www.freepatentsonline.com /4452248.html (6860 words)

	Sinus Rhythm Page. (Site not responding. Last check: 2007-10-11)
		Examine the six second strip, notice that the rhythm is regular and no extra beats, early or late beats are present.
		Examine the six second strip, notice that the rhythm is regular and no extra beats or early or late beats.
		They are all Sinus in origin, the rhythm cycle is beginning in the Sinus Node, but pathology is present, but not in the Atriums, but in the Ventricles, or the conduction system of the Ventricles.
	www.randylarson.com /acls/sinus3.html (618 words)

	normal rhythm sinus
		If you suspect that your sinus inflammation may be related to dust, mold, pollen, or food—or any of the hundreds of allergens that can trigger an upper respiratory reaction—you should consult your doctor.
		Sinus rhythm is characterized by a usual rate of 50...
		Thanks for visiting us in your search for normal rhythm sinus.We continue to add articles, press releases and info from the web as we research it for you so please bookmark us and return soon.
	www.headache-tip-news.com /normal-rhythm-sinus.html (441 words)

	Sinus Rhythm (Site not responding. Last check: 2007-10-11)
		Normal sinus rhythm results from cardiac impulses that originate in the SA node and continue on to the AV node, Bundle of His, left and right bundle branches and Purkinje system.
		Sinus rhythm (normal sinus impulses are formed) includes:
		Artifact - a normal rhythm can appear abnormal due to patient movement, positioning, electrical interference, etc.
	cal.vet.upenn.edu /anestecg/Basics/Rhythm/sinusrhy.htm (189 words)

	Normal Sinus Rhythm Database (Site not responding. Last check: 2007-10-11)
		We plan to expand this database many-fold in order to obtain a representative sample of normal sinus rhythm across a wide range of ages in men and women.
		They offer the opportunity to observe normal sinus rhythm in the context of high physical fitness and extreme physical exertion.
		In comparison with our recordings of heart failure and sudden cardiac death, these represent the opposite extreme of health, and (together with the main section of the Normal Sinus Rhythm Database) these recordings help to complete a view of cardiac rhythm as a window on health.
	reylab.bidmc.harvard.edu /DynaDx/database/node14.html (303 words)

	The Electrophysiology Service at UCSF- An Overview
		Medications to stabilize the heart rhythm - These medications are used to restore and maintain the normal sinus rhythm by stabilizing the electrical activity of the heart muscle cells.
		The normal electrical conduction system is interrupted by a small burn produced by the use of RF catheter (radiofrequency catheter) on the AV node.
		In an even newer form of treatment, a pacemaker may be implanted without ablating the AV node in an attempt to keep you in sinus rhythm, sometimes by pacing from more than one location in the atrium.
	cardiology.ucsf.edu /ep/afibnyou/treatment.html (2004 words)

	American College of Medical Toxicology
		These findings suggest the desirability of sinus rhythm, but the relative benefits of cardioversion and maintenance of sinus rhythm compared against rate control and anticoagulation have not been established.
		All antiarrhythmic agents used for maintenance of sinus rhythm have the potential to precipitate life-threatening ventricular arrhythmias; most, when used in long-term therapy, are associated with an increased risk of death.
		Because of the benefits of sinus rhythm, the development of pharmacologic agents that restore sinus rhythm and improve survival has remained a priority.
	www.ijmt.net /ijmt/4_2/4_2_16.html (2790 words)

	American Family Physician: Treatment of refractory atrial fibrillation: a meta-analysis - adapted from the Archives of ...
		The percentage of persons who received these drugs and remained in normal sinus rhythm at three and 12 months was compared with data from a prior meta-analysis of studies that used quinidine as first-line therapy for atrial fibrillation.
		Data regarding successful conversion to normal sinus rhythm revealed that 42.3 percent of persons were successfully converted using amiodarone alone.
		The proportion of the persons who received annodarone who remained in normal sinus rhythm at three months was significantly greater than the proportion that could be expected with a standard regimen of quinidine.
	www.findarticles.com /p/articles/mi_m3225/is_n2_v53/ai_18028340 (533 words)

	[No title] (Site not responding. Last check: 2007-10-11)
		Normally, the sinoatrial node initiates each heart-beat cycle by depolarizing so as to generate an action potential.
		In contrast to the normal sinus rhythm of Fig.
		The accompanying drawings, which are incorporated in and form a part of the specification, illustrate preferred embodiments of the present invention and, together with the description, serve to explain the principles of the invention.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=98/41144.980924&ELEMENT_SET=DECL (11802 words)

	Rhythm Challenge
		Normal sinus rhythm with a premature junctional contraction (note, this is not an escape beat as there is usually a pause before an escape beat)
		Normal sinus rhythm or sinus tachycardia depending on R to R you measure into accelerated idioventricular rhythm (AIVR is a rhythm from 40 to 120 b/min; remember, ventricular tachycardia is a rate greater than 120 beats/min)
		Normal sinus rhythm or sinus tachycardia depending on which R to R you have measured with a PVC
	www.unm.edu /~lkravitz/EKG/rhythmchall.html (192 words)

	Sinus Rhythm Page. (Site not responding. Last check: 2007-10-11)
		Examine the six second strip, notice that the rhythm is regular with an irregular section.
		I marked the "R" to "R" interval on the first strip on a Normal "R" to "R" interval, and the abnormal "R" to "R" interval.
		The normal "PR" interval is.12 to.20 (120 milliseconds to 200 milliseconds).
	www.randylarson.com /acls/extra.html (1336 words)

	Cardiac Arrhythmias The first use of PHT in cardiac disorders was reported by LEONARDin 1958
		In eight cases response was excellent with conversion to normal sinus rhythm which continued up to the eight months the patients were followed.
		During intravenous administration of PHT, continuous electrocardiographic monitoring was usually performed, and after conversion to sinus rhythm or subsidence of the arrhythmia, monitoring of the cardiac rhythm was continued for a period of ten minutes.
		PHT alone corrected the arrhythmias in thirty-nine patients: twenty-two with severe, and sixteen with moderate hemodynamic abnormalities, and one with normal hemodynamics. The authors observed that PHT was most effective in patients with the most abnormal hemodynamics, and say that PHT is the drug of choice for children with ventricular dysrhythmias.
	www.remarkablemedicine.com /Clinical/clinicaluses/cardiodisorders/arrhythmias.html (4528 words)

	American Family Physician: Safety of Sotalol for Sinus Rhythm Maintenance
		The use of antiarrhythmic medications to maintain normal sinus rhythm in patients with atrial fibrillation is a common practice.
		The maintenance of normal sinus rhythm in patients in the control group was much lower-5 to 28 percent after 12 months.
		Although quinidine and sotalol were significantly more successful in maintaining normal sinus rhythm than control, approximately 50 percent of patients had recurrent atrial fibrillation within the first six months despite treatment.
	www.findarticles.com /p/articles/mi_m3225/is_1_61/ai_59426925 (408 words)

	Heart: Rhythm Disorders
		"Normal" refers to a heart (pulse) rate between 60 and 100.
		In the normal sinus rhythm the ECG waves are usually regular, meaning their peaks are evenly spaced.
		The most common abnormal heart rhythm is atrial fibrillation, which causes an "irregularly irregular" heartbeat, with no repeat pattern.
	www.webmd.com /content/tools/1/anatomy_heart_rhythm.htm (319 words)

	UpToDate Sinus tachycardia
		— Sinus tachycardia is a rhythm in which the rate of impulses arising from the SA node is elevated.
		The normal heart rate has been considered historically to range from 60 to 100 beats/min, with sinus tachycardia being defined as a sinus rhythm with a rate exceeding 100 beats/min.
		The resting sinus rate in older children [1] and adults [2] is approximately 65 to 85 beats/min with some authors suggesting a slowing in older age [3].
	patients.uptodate.com /topic.asp?file=carrhyth/9678 (417 words)

	atrial fib, ablation, afib, atrial fibrillation (Site not responding. Last check: 2007-10-11)
		Tikosyn (Dofetilide) is a new medication that is used to convert atrial fibrillation to normal sinus rhythm (NSR).
		Electrical cardioversion of patients with atrial fibrillation (AF) to normal sinus rhythm is frequently performed to relieve symptoms, improve cardiac performance and reduce the risk of stroke.
		The benefit of microwave radiation in comparison to other surgical ablation techniques, is that the depth and volume of heated tissue is more controlled and precise lesions are created, and less charring of the heart's surface occurs, decreasing the risk of blood clots that may travel to the brain or other organs.
	www.clevelandclinic.org /heartcenter/pub/atrial_fibrillation/afib_innovations.htm (1834 words)

	Atrial Fibrillation
		During normal atrial contraction, which initiates in the sinoatrial node, electrical conduction is sent to the atrioventricular (AV) node.
		the decision to cardiovert and maintain normal sinus rhythm is based on an evaluation of the risks, likelihood of success, and benefits of achieving sinus rhythm.
		Betapace AF is indicated for maintenance of sinus rhythm following cardioversion from atrial fibrillation and is generally not used for acute cardioversion.
	www.uspharmacist.com /oldformat.asp?url=newlook/files/Feat/Atrial.htm&pub_id=8&article_id=826 (3500 words)

	[No title]
		Normal Sinus Rhythm Originate in Sinus Node Normal P wave (normal axis, morphology) Constant and normal P-R interval (btw 0.12 - 2.0sec) Rate btw 60-100 beats per minute P-P and R-R cycle should be constant also II.
		P waves from normal sinus rhythm are sometimes prevented from conducting through the AV node due to the ectopic beats.
		The QRS complexes have an intermediate morphology between normal and abnormal QRS due to depolarization from both normal sinus rhythm from the atria and ectopic ventricular beats.
	www.uhmc.sunysb.edu /som/students/2002/2002Web/Lectures/Cardio/Cardio33.doc (2456 words)

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