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Arrhythmia is a condition characterized by an irregular heart rhythm, with ECG changes that differ based on its origin and nature. The types of arrhythmias discussed below include atrial, junctional, and ventricular arrhythmias.Atrial ArrhythmiasPremature Atrial Complexes (PACs): PACs are early atrial beats caused by stress, caffeine, alcohol, electrolyte imbalances, hypoxia, hyperthyroidism, or certain medications (e.g., bronchodilators and decongestants). The ECG shows early P waves with an...
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Arrhythmia or dysrhythmia refers to an abnormal heart rhythm caused by a defect in the heart's conduction system. It can cause the heart to beat irregularly, too quickly, or too slowly, leading to symptoms like chest pain, shortness of breath, and fainting. Factors such as stress, caffeine, alcohol, nicotine, cocaine, certain drugs, congenital defects, diseases, and electrolyte abnormalities can trigger arrhythmias.
Arrhythmias are categorized by their speed, rhythm, and origin. A slow heart...
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Dysrhythmia management involves a multifaceted approach, incorporating pharmacological treatments, medical procedures, surgical interventions, lifestyle modifications, and patient education.Pharmacological ManagementAntiarrhythmic Drugs:Class I (Sodium Channel Blockers): This class includes quinidine and procainamide, which reduce the speed of impulse conduction in the heart, stabilize the cardiac membrane, and control arrhythmias. Quinidine and procainamide are Class IA agents that prolong the...
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Dysrhythmias V: Evaluating Dysrhythmias01:30

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Dysrhythmias, also known as arrhythmias, are disturbances in the heart's rhythm that range from benign to life-threatening. A thorough evaluation is crucial for appropriate management and involves a comprehensive medical history, physical examination, and various diagnostic tests.Medical HistorySymptoms: Collect detailed information on palpitations, dizziness, syncope, chest pain, and fatigue. Note their onset, frequency, and triggers.Previous Cardiac Issues: Document any history of heart...
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Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
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Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

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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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Related Experiment Video

Updated: Mar 26, 2026

Robotic Ablation of Atrial Fibrillation
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[Typical atrial flutter: Diagnosis and therapy].

Dierk Thomas1, Lars Eckardt2, Heidi L Estner3

  • 1Klinik für Kardiologie, Angiologie und Pneumologie, Universitätsklinikum Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Deutschland. dierk.thomas@med.uni-heidelberg.de.

Herzschrittmachertherapie & Elektrophysiologie
|February 6, 2016
PubMed
Summary
This summary is machine-generated.

Typical atrial flutter, a common heart rhythm disorder, increases with age and can cause symptoms like palpitations. Catheter ablation offers a highly successful treatment for this condition.

Keywords:
AnticoagulationCardiac arrhythmiaCatheter ablationCavotricuspid isthmusSupraventricular tachycardia

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Area of Science:

  • Cardiology
  • Cardiac Electrophysiology

Background:

  • Typical, cavotricuspid-dependent atrial flutter is a prevalent atrial macroreentry tachycardia.
  • Its incidence escalates with age, affecting approximately 600/100,000 individuals over 80.
  • Heart failure and pulmonary disease elevate the risk of typical atrial flutter.

Observation:

  • Patients may experience palpitations, dyspnea, chest pain, and reduced exercise capacity.
  • The thromboembolic risk mirrors that of atrial fibrillation, necessitating similar antithrombotic prophylaxis.
  • Acutely symptomatic cases may be managed with cardioversion or pharmacologic rate control.

Findings:

  • Catheter ablation of the cavotricuspid isthmus is the primary long-term therapeutic strategy.
  • This procedure boasts high success rates exceeding 97% with low complication rates around 0.5%.

Implications:

  • This review details the mechanistic and clinical aspects of isthmus-dependent atrial flutter.
  • It emphasizes electrophysiological findings and catheter ablation as key management strategies.
  • The content aims to enhance professional education in cardiac electrophysiology.