2006-10-04 02:59:29 · 10 answers · asked by advait d 1 in Health ➔ Other - Health
A fast rhythm (more than 100 beats per minute) originating at the sinus node
2006-10-04 03:00:50 · answer #1 · answered by big_shot_nurse 3 · 0⤊ 0⤋
It is a rapid heart rate, anything over 100 beats per minute is considered Tachycardia. Sinus tachycardia simply means that the nerve impulse causing the heart beat originates in the sinus node which is where it should originate. When exercising, sinus tachycardia is desirable as it strengthens the heart, but at rest the heart rate should be in the 80's.
2006-10-04 10:07:06 · answer #2 · answered by essentiallysolo 7 · 0⤊ 0⤋
Sinus tachycardia: A fast heartbeat (tachycardia) because of rapid firing of the sinoatrial (sinus) node.
The sinoatrial (or sinus) node is the natural pacemaker of the heart. It is located in the wall of the right atrium (the right upper chamber of the heart). Normal cardiac impulses start there and are transmitted to the atria and down to the ventricles (the lower chambers of the heart).
Sinus tachycardia occurs in response to exercise, exertion, excitement, pain, fever, excessive thyroid hormone, low blood oxygen (hypoxia), stimulant drugs (such as caffeine and amphetamines), etc.
Although sinus tachycardia is usually a response to one or another fleeting stimulus, it can upon occasion be a sign of heart failure, heart valve disease, or another significant illness.
2006-10-04 10:11:39 · answer #3 · answered by jmj 2 · 0⤊ 0⤋
Sinus tachycardia is a rhythm with elevated rate of impulses originating from the SA node, defined as a rate greater than 100 beats/min in an average adult. The normal heart rate in the average adult ranges from 60-100 beats/min. Note that the normal heart rate varies with age, with infants having normal heart rate of 110-150 bpm to the elderly, who have slower normals.
2006-10-04 10:32:52 · answer #4 · answered by Anonymous · 0⤊ 0⤋
The heart is beating fast and the trigger mechanism is the normal sinus in the atrium.
2006-10-04 10:02:25 · answer #5 · answered by Anonymous · 0⤊ 0⤋
sinus tachycardia (IST) is an uncommon type of cardiac arrhythmia, within the category of supraventricular tachycardia (SVT). The mechanism and primary etiology of Inappropriate sinus tachycardia has not been fully elucidated. The mechanism of the arrhythmia primarily involves the Sinus Node and peri-nodal tissue1 and does not require the AV Node (Atrioventricular node) for maintenance. Treatments in the form of pharmacological therapy or Catheter ablation are available, although it is currently difficult to treat successfully.
Symptoms
Symptoms reported by patients vary in frequency and severity.
The main symptoms associated with Inappropriate sinus tachycardia include:
* Frequent Palpitations
* Dyspnea (Shortness of Breath) and Palpitations on exertion
* Pre-Syncope (feeling as if about to faint)
* Fatigue (physical)
* Dizziness
* Exercise intollerance
* Occasional Paresthesia
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Diagnosis
No formal diagnostic criteria exist. A diagnosis of Inappropriate sinus tachycardia is primarily one of exclusion and the following may be observed:
* Exclusion of all other causes of Sinus tachycardia
* Common forms of Supraventricular tachycardia (SVT) must be excluded
* Normal P wave morphology
* A resting Sinus tachycardia is usually (but not always) present
* Nocturnal dip in Heart rate
* Inappropriate Heart rate response on exertion
* Mean Heart rate in 24hrs >95bpm
* Symptoms are documented to be due to tachycardia
* Hypotension is occasionally observed
* Syncope (fainting) is occasionally reported
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Treatment
IST has been treated both pharmacologically and invasively, with varying degrees of success.
Some types of medication tried by cardiologists and other physicians include: Beta blockers, Calcium channel blockers and Antiarrhythmic agents. Some SSRI drugs are also occasionally tried and also treatments more commonly used to treat Postural orthostatic tachycardia syndrome such as Fludrocortisone. This approach is very much "trial-and-error". Patients with IST are often intollerant to Beta blockers.
Invasive treatments include forms of Catheter ablation such as Sinus Node Modification2 (selective ablation of the Sinus Node), Complete Sinus Node Ablation (with associated implantation of a Permanent Artificial pacemaker) and AV Node Ablation in very resistant cases (creation of iatrogenic complete heart block, necessitating implantation of a Permanent Artificial pacemaker).
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External links
* Inappropriate sinus tachycardia by Dr Rich Fogoros
* Inappropriate Sinus Tachycardia - Info & Support
* Arrhythmia Alliance
2006-10-04 23:34:56 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Sinus tachycardia is when sinoatrial node sends more impulses for rapid heart beat. This occurs during exercise,fever,thyrotoxicosis and anxiety.
2006-10-04 10:10:24 · answer #7 · answered by J.SWAMY I ఇ జ స్వామి 7 · 0⤊ 0⤋
fast heart rate but regular in rhythm originating from the sino atrial node.
2006-10-04 10:02:54 · answer #8 · answered by cheesecake 1 · 0⤊ 0⤋
A very serious ailment that should be considered fatal if not taken care of.
2006-10-04 10:01:01 · answer #9 · answered by Anonymous · 0⤊ 0⤋
Fast heartbeat.
2006-10-04 10:00:38 · answer #10 · answered by Rea 3 · 0⤊ 0⤋