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Related Concept Videos

Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

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Tachyarrhythmias are a type of dysrhythmia where the heart rate exceeds 100 beats per minute. Here are some common types of tachyarrhythmias:Sinus TachycardiaSinus tachycardia originates from increased impulses from the sinus node, leading to an elevated heart rate. It is often triggered by stress, fever, or exercise.Patients may experience palpitations, a sensation of a racing heart, dizziness, and chest discomfort.Causes and Risk Factors: Common causes include physical exertion, emotional...
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ECG Interpretation of Arrhythmias I: Sinus Arrhythmias01:16

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

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Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism,...
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Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

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Dysrhythmias, also known as arrhythmias, are irregular heart rhythms that result from abnormal electrical activity in the heart, affecting its ability to circulate blood efficiently. Tachyarrhythmias, a subset of dysrhythmias, are characterized by abnormally fast heart rates exceeding 100 beats per minute. Here are some types of tachyarrhythmias with their distinct ECG features:Sinus Tachycardia:Sinus tachycardia presents a regular heart rhythm with an increased rate of 101-180 beats per...
718
Increased pulse rate01:17

Increased pulse rate

1.6K
Tachycardia is a condition marked by an abnormally fast or irregular heart rate, surpassing the typical resting rate. In adults, tachycardia is characterized by a pulse rate ranging from 100 to 180 beats per minute. The increased heart rate can result in inadequate blood flow to various body parts, ultimately diminishing the oxygen supply to organs and tissues.
Many factors can elevate the risk of developing tachycardia. These include advanced age, a family history of arrhythmias, and an...
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Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

840
Bradyarrhythmias are cardiac rhythm disorders characterized by a slower-than-normal heart rate, typically defined as fewer than 60 beats per minute. Some of which are discussed here:Sinus BradycardiaSinus bradycardia presents a heart rate lower than 60 beats per minute, with a regular rhythm originating from the SA node. The ECG typically shows normal P waves preceding each QRS complex, a normal PR interval (0.12 to 0.20 seconds), and a normal QRS duration (0.06 to 0.10 seconds).First-Degree AV...
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Decreased pulse rate01:14

Decreased pulse rate

1.1K
Bradycardia is a medical condition in which the heart rate is slower than normal. It occurs when the heart's natural pacemaker, the sinus node, generates slower electrical impulses than the standard rhythm. In adults, bradycardia is diagnosed when the pulse rate falls below 60 beats per minute, indicating a deviation from the normal heart rate range.
There are specific risk factors that can elevate the likelihood of developing bradycardia. Advanced age is a significant factor, with...
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Tachycardia-Induced Cardiomyopathy As a Chronic Heart Failure Model in Swine
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[Inappropriate sinus tachycardia].

Samuel Sossalla1, Dirk Vollmann2

  • 1Klinik für Kardiologie und Pneumologie der Universitätsmedizin Göttingen.

Deutsche Medizinische Wochenschrift (1946)
|May 7, 2015
PubMed
Summary
This summary is machine-generated.

Inappropriate sinus tachycardia (IST) causes a rapid heart rate without a clear reason. Diagnosis and treatment of IST are often empirical, focusing on excluding secondary causes and managing symptoms with medication or ablation.

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Area of Science:

  • Cardiology
  • Electrophysiology

Background:

  • Inappropriate sinus tachycardia (IST) presents as unexplained resting tachycardia (>100 bpm) with exaggerated heart rate response to activity.
  • Patients experience symptoms like palpitations, fatigue, and dizziness.
  • The underlying mechanisms and long-term prognosis of IST remain unclear.

Purpose of the Study:

  • To review the current understanding of inappropriate sinus tachycardia.
  • To outline diagnostic considerations and therapeutic strategies for IST.

Main Methods:

  • Literature review of inappropriate sinus tachycardia.
  • Analysis of diagnostic criteria and treatment options.

Main Results:

  • Diagnosis requires excluding secondary causes of tachycardia.
  • Management includes lifestyle changes, beta-blockers, or ivabradine.
  • Radiofrequency catheter ablation is reserved for refractory cases.

Conclusions:

  • IST diagnosis and management are currently empirical.
  • A systematic approach is necessary, starting with excluding secondary causes.
  • Treatment should be tailored to symptom severity and patient profile.