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| | Re: tachycardia |
 | | CONCLUSIONS: RF modification of the sinus node is feasible and effective for IST, and should be the treatment of choice in patients refractory to medical therapy. | | | However, in symptomatic patients with inappropriate sinus tachycardia resistant to drug therapy, catheter ablation of the His' bundle with permanent pacemaker insertion is currently applied. | | | This region was further defined by use of intracardiac echocardiography (ICE) in 9 patients, in whom it was found that an ablation catheter could be guided reliably and maintained on the crista terminalis. |
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http://www.medhelp.org/forums/cardio/archive/8049.html
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| | Conduction system |
| | Consequently, the most practical way to localize the invisible atrioventricular node and bundle is to draw a line mentally between the ostium of the coronary sinus and the membranous septum at the anteroseptal commissure of the tricuspid valve. | | | The tendon of Todaro is formed by the anterior prolongation of the Eustachian valve of the inferior vena cava and the Thebesian valve of the coronary sinus, which fuse and run anteriorly as one tendon beneath the right atrial endocardial surface. | | | Moreover, the Thebesian valve of the coronary sinus is quite a variable structure. |
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http://www.pediheart.org/practitioners/anatomy/conduction.htm
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| | BestDoctors.com: Condition Summary: Bradycardia |
| | Both the AV node and the bundle of His are subject to injury at the time of cardiac surgery, especially surgery to repair or replace the aortic and mitral valves. | | | The heart rate, governed by the sinus node, is subject to a number of external influences, in particular autonomic nervous system tone. | | | The heart rate is designed to fluctuate, both up and down, in response to the physiologic demands of the body. |
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http://www.bestdoctors.com/en/conditions/b/bradycardia/bradycardia_120600.htm
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| | eMedicine - Sinus Node Dysfunction : Article by Adrian W Messerli, MD |
| | Carotid sinus massage: Carotid sinus massage may be helpful. | | | For this reason, cardiac pacing has become the cornerstone of therapy for symptomatic patients. | | | Finally, carotid sinus syndrome has been associated with increased vagal tone that infrequently leads to symptomatic bradyarrhythmias. |
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http://www.emedicine.com/med/topic2132.htm
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| | Nursing: Identifying inappropriate sinus tachycardia |
| | Drug therapy, the usual starting place for treating IST, takes aim at the sinus node; however, the sinus node's response to drugs is extremely variable. | | | Radiofrequency catheter ablation is an alternative for patients who don't want long-term drug therapy or who don't respond well to medical management. | | | For example, younger patients and women of childbearing age may not want to take long-term drug therapy. |
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http://www.findarticles.com/p/articles/mi_qa3689/is_200107/ai_n8979994
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| | Sick Sinus Syndrome: What You Should Know -- familydoctor.org |
| | Sick sinus syndrome is the name for several conditions in which the sinus node does not work the right way. | | | Your doctor may be able to tell whether you have sick sinus syndrome by doing some tests. | | | In addition, your doctor may want to change some of your other medicines because some medicines can make sick sinus syndrome worse. |
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http://familydoctor.org/767.xml
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| | Clinical Trial: Mode Selection Trial in Sinus Node Dysfunction (MOST) |
| | Predictors of stroke in patients paced for sick sinus syndrome. | | | While none of these studies was a randomized trial, the literature is consistent with a concept that dual mode pacing results in improved hemodynamics and a more favorable outcome in patients with sick sinus syndrome. | | | These more advanced pacemakers are more costly and complicated to place surgically. |
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http://clinicaltrials.gov/show/NCT00000561
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| | American Family Physician: Diagnosis and treatment of sick sinus syndrome |
| | Symptoms of sick sinus syndrome may be variable, intermittent, and difficult to associate with ECG changes. | | | If carotid massage produces abrupt sinus arrest of three seconds' duration, sinus node dysfunction may be suspected. | | | The sinus bradycardia that occurs in patients with sick sinus syndrome is inappropriate and not caused by medications. |
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http://www.findarticles.com/p/articles/mi_m3225/is_8_67/ai_100572096
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| | Sick sinus syndrome |
| | Patients with sick sinus syndrome should generally receive dual chamber pacing systems to prevent atrial fibrillation (involuntary contraction of the muscles of the atria). | | | Some drugs are used to treat sick sinus syndrome, but digitalis should be used with caution. | | | Elimination of a drug therapy which aggravates sick sinus syndrome is the first line of treatment for some patients. |
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http://www.healthatoz.com/healthatoz/Atoz/ency/sick_sinus_syndrome.jsp
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| | UpToDate Electrophysiologic evaluation of the sick sinus syndrome |
| | In one study of 77 patients it had a sensitivity and specificity of 80 and 97 percent, respectively, which was comparable to those of SNRTc obtained invasively [9]. | | | This is followed by a routine electrocardiogram that may provide further information. | | | The abnormal responses in patients with sinus node dysfunction are listed in the accompanying table (show table 2). |
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http://patients.uptodate.com/topic.asp?file=carrhyth/10795
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| | Arrythmia |
| | Fro some patients, sinus bradycardia, particularly when it is present only at rest, may simply reflect a normal response to increased vagal tone, as in a well-trained athlete. | | | Abnormal conditions like ischemia (inadequate oxygen level due to coronary atherosclerosis causing reduced blood flow) or drug (medication) treatment increases rate of firing of His-Purjinke system pacemaker to overcome the sinus node rate. | | | Sinus bradycardia may be due to an intrinsic abnormality of pacemaker cells, a parasympathetic dysautonomia (inappropriate sinus bradycardia), or an extrinsic factor such as suppression of automaticity by drug therapy (e.g., a beta blocker, a Ca2~ channel blocker, or an antiarrhythmic agent). |
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http://www.rjmatthewsmd.com/Definitions/arrythmia.htm
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| | eMedicine - Sinus Node Dysfunction : Article by M Silvana Horenstein, MD |
| | However, implantation of a permanent pacemaker is required if bradycardia is severe for the patient's age or if SND is accompanied by dizziness, fatigue, CHF, chest pain and palpitations (in patients with bradyarrhythmias or tachyarrhythmias), and especially syncope. | | | Because of the patient's symptoms and his sinus node dysfunction, he received an atrial pacemaker. | | | In this case, the lightheadedness and, ultimately, the syncope define sick sinus syndrome, with the patient requiring pacemaker therapy. |
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http://www.emedicine.com/ped/topic2533.htm
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| | Sinus node definition - Medical Dictionary definitions of popular medical terms |
| | This quick response is important during exercise when the heart has to increase its beating speed to keep up with the body's increased demand for oxygen. | | | The sinus node is the heart's natural pacemaker. | | | Sinus node: The sinus node is one of the major elements in the cardiac conduction system, the system that controls the heart rate. |
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http://www.medterms.com/script/main/art.asp?articlekey=8448
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| | MedlinePlus Medical Encyclopedia: Sick sinus syndrome |
| | However, this correlation often is difficult to prove. | | | The symptoms are non-specific and may mimic other disorders. | | | Sick sinus syndrome may cause symptoms of heart failure to occur or worsen. |
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http://www.nlm.nih.gov/medlineplus/ency/article/000161.htm
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| | New Page |
| | This is often called a “nodal escape rhythm.” If the ventricular muscle becomes the pacer, a wide-QRS ventricular escape rhythm will develop, at a rate of around 30. | | | This block occurs high in the AV node, and is usually caused by acute, reversible conditions. | | | Sinus rhythm faster than 100 beats per minute is called sinus tachycardia; slower than 60 is called sinus bradycardia. |
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http://www.madsci.com/manu/ekg_rhy.htm
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| | Children's Heart Institute How the Heart Works: The Heart Electric System |
| | This will make you under your child's condition or your condition if you have irregular heart beats or a condition related to very fast heart beat or a slow heart beat. | | | The AV Node is responsible for transmitting the impulse from the atria to the ventricles. | | | After activating the heart muscle to contract, the electric impulse disappears, the heart muscle, then relaxes, and is waiting for the sinus node to generate a new electric impulse before it contracts again. |
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http://www.childrensheartinstitute.org/educate/heartwrk/elechhse.htm
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| | Electrical System: Anatomy and Function - Children's Hospital Boston |
| | The bundle of His divides into right and left pathways to provide electrical stimulation to both ventricles. | | | Under some conditions, almost all heart tissue is capable of starting a heartbeat, or becoming the "pacemaker," just like the sinus node. | | | Under normal conditions, the sinus node generates an electrical stimulus every time the heart beats (60 to 190 times per minute, depending on the age of the child and his/her activity level). |
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http://www.childrenshospital.org/az/Site567/mainpageS567P0.html
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| | Inappropriate Sinus Tachycardia - Information and Support - Welcome |
| | If you have any links you would like to see here on IST or related conditions; then please send them to me via email. | | | in a patient with persistent inappropriate sinus tachycardia | | | Sinus node modification by catheter using radiofrequency current in a patient with inappropriate sinus tachycardia. |
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http://www.geocities.com/inappropriatesinustachy/links2.html
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| | NurseWeek HealthWeek |
| | 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. | | | This term refers to beats that originate from the SA node and have a rate inherent to it. |
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http://nurse.cyberchalk.com/nurse/courses/nurseweek/nw1120/c3/p1.htm
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| | Sinoatrial Node |
| | Understanding AFA doctorreviewed resource for patients looking for objective, accurate, and balanced information about atrial fibrillation and its treatment, with a focus on stroke prevention.Sponsored by: | | | allRefer Health Sick Sinus Syndrome InformationProfiles the causes, tests, symptoms, diagnosis, and treatment of bradycardiatachycardia syndrome, in which the heart's natural pacemaker, the sinus node, malfunctions.Sponsored by: health.allrefer.com/health/sicksinussyndromeinfo.html [ Reviewed] 1 | | | Organ: Sinoatrial node WrongDiagnosis.comOrgan Sinoatrial node including diseases and disorders affecting the Sinoatrial node organ or body system. |
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http://var28.com/real4/29/sinoatrial-node.html
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| | Sick Sinus Syndrome |
| | This generally does not cause problems for most people, and drugs that slow the heart rate are useful treatments for some types of arrhythmias or other heart disorders. | | | Many people with sick sinus syndrome have no symptoms, or the symptoms may not seem serious enough for concern. | | | Some medications prescribed to treat high blood pressure, coronary artery disease and other conditions, for example, are known to cause bradycardia. |
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http://www.naspe-patients.org/patients/heart_disorders/sick_sinus
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| | U-M CVC - Sick Sinus Syndrome |
| | Unfortunately, there are no medications that can be used chronically to treat sick sinus syndrome. | | | The health effects of sick sinus syndrome vary widely. | | | If needed, pacemakers have proven to be effective in treating the symptoms with few changes in lifestyle needed. |
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http://www.med.umich.edu/cvc/mchc/parsick.htm
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| | Sinus dysrhythmia - MayoClinic.com |
| | Sinus dysrhythmia is a variation of normal and requires no treatment. | | | Sinus dysrhythmia refers to a malfunction of the sinus node, the heart's natural pacemaker. | | | Sinus dysrhythmia may be found incidentally on an electrocardiogram done for some other reason. |
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http://www.mayoclinic.com/health/sinus-dysrhythmia/AN00787
(232 words)
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| | Symptoms of Sinus node disease - CureResearch.com |
| | Furthermore, symptoms of Sinus node disease may vary on an individual basis for each patient. | | | This symptom information has been gathered from various sources, may not be fully accurate, and may not be the full list of symptoms of Sinus node disease. | | | Use of this site is subject to our TERMS OF USE. |
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http://www.cureresearch.com/s/sinus_node_disease/symptoms.htm
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| | Symptoms of Sinus node disease - WrongDiagnosis.com |
| | Furthermore, signs and symptoms of Sinus node disease may vary on an individual basis for each patient. | | | This signs and symptom information for Sinus node disease has been gathered from various sources, may not be fully accurate, and may not be the full list of Sinus node disease signs or Sinus node disease symptoms. | | | Note that Sinus node disease symptoms usually refers to various symptoms known to a patient, but the phrase Sinus node disease signs may refer to those signs only noticable by a doctor: |
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http://www.wrongdiagnosis.com/s/sinus_node_disease/symptoms.htm
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| | Sick Sinus Syndrome - Page 1 - HeartCenterOnline: |
| | The primary symptom of SSS is sinus bradycardia, a heart rhythm that is slower that 60 beats per minute. | | | Many patients with sick sinus syndrome will not feel any symptoms until their heart rate drops below 50 beats per minute. | | | Therefore, the condition is often not diagnosed until its advanced stages. |
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http://heart.healthcentersonline.com/arrhythmia/sicksinussyndrome.cfm
(336 words)
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| | Sinoatrial node -- Facts, Info, and Encyclopedia article |
| | The sinoatrial node (abbreviated SA node, also called the sinus node) is the impulse generating (pacemaker) tissue located in the right atrium of the (The hollow muscular organ located behind the sternum and between the lungs; its rhythmic contractions pump blood through the body) heart. | | | Because the sinoatrial node is responsible for the rest of the heart's electrical activity, it is sometimes called the primary pacemaker. | | | Stimulation of the vagus nerve causes decrease in the SA node rate (thereby causing decrease in the heart rate). |
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http://www.absoluteastronomy.com/encyclopedia/S/Si/Sinoatrial_node.htm
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| | THE MERCK MANUAL, Sec. 16, Ch. 205, Arrhythmias |
| | Bradycardia-tachycardia syndrome is an important variant of sick sinus syndrome, in which atrial flutter and fibrillation alternate with prolonged asystolic periods. | | | Many types of sick sinus syndrome cause no symptoms, but when heart rates are persistently and inappropriately low, lethargy and fatigue are common. | | | However, many patients have features that suggest that abnormalities are not merely confined to the sinus node; coexisting atrioventricular nodal abnormalities are common. |
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http://www.merck.com/mrkshared/mmanual/section16/chapter205/205o.jsp
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| | Ekg Abnormal Sinus Rhythm Results |
| | Cardiac arrhythmia (dysrhythmia) is an abnormal heart rhythm resulting from any change, deviation or malfunction in the heart's conduction system -- the system through which normal electrical impulses travel through the heart. | | | An arrhythmia (also called dysrhythmia) is an abnormal rhythm of the heart, which can cause the heart to pump less effectively. | | | Learn electrocardiography by seeing examples of the various abnormalities. |
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http://www.ekg-machines.net/directory/ekg-abnormal-sinus-rhythm.html
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| | Heart Info - Pacemakers and ICDs: A Patient Guide |
| | A pacemaker is needed when the function of the sinus node becomes too slow from age, heart disease, or heart medications. | | | Normal heartbeat is controlled by a natural pacemaker in the heart called the sinus node. | | | Another leading cause for pacemaker implantation is heart block-the failure of the electrical signal to reach the main pumping chambers of the heart, which in turn causes a slow heart rate. |
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http://www.heartinfo.org/ms/guides/1/main.html
(1159 words)
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| | sinus node: Definition and Much More From Answers.com |
| | sinus node: Definition and Much More From Answers.com | | | sinus node is mentioned in the following topics: | | | The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2004, 2000 by Houghton Mifflin Company. |
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http://www.answers.com/topic/sinus-node
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| | [No title] |
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http://www.uhmc.sunysb.edu/som/students/2003/Lectures/Cardio/cardio30.doc
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| | Find in a Library: The sinus node in pediatrics |
| | WorldCat is provided by OCLC Online Computer Library Center, Inc. on behalf of its member libraries. | | | Find in a Library: The sinus node in pediatrics |
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http://www.worldcatlibraries.org/wcpa/ow/e235daf3ce83f390.html
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