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Related Concept Videos

Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

192
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...
192
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

249
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...
249
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

1.7K
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...
1.7K
Mechanism of Cardiac Arrhythmias01:28

Mechanism of Cardiac Arrhythmias

1.3K
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.
1.3K
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

224
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...
224
Increased pulse rate01:17

Increased pulse rate

813
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...
813

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Updated: Oct 26, 2025

Real-Time Cardiac Mapping with a Noninvasive Imageless Electrocardiographic Imaging System
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Incessant Atrial Tachycardia as First Presentation of Cardiac Angiosarcoma.

Heajung L Nguyen1, Duc Do2, Janet K Han2,3

  • 1Division of Cardiology, Department of Medicine, David Geffen School of Medicine at the University of California Los Angeles, Los Angeles, California, USA.

JACC. Case Reports
|July 28, 2021
PubMed
Summary

Primary cardiac angiosarcoma, a rare cancer, can cause incessant atrial tachycardia and tachycardia-mediated cardiomyopathy. This case highlights a rare presentation of cardiac malignancy.

Keywords:
AT, atrial tachycardiaCMR, cardiac magnetic resonanceEF, ejection fractionRA, right atrialRAA, right atrial appendageSVC, superior vena cavaTTE, transthoracic echocardiogramatrial tachycardiacardiac angiosarcoma

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Area of Science:

  • Cardiovascular Pathology
  • Oncology

Background:

  • Primary cardiac angiosarcomas are exceedingly rare and associated with a poor prognosis.
  • Malignant tumors of the heart present diagnostic and therapeutic challenges.

Observation:

  • A 48-year-old male with no prior cardiac history presented with incessant focal atrial tachycardia.
  • The tachycardia led to the development of tachycardia-mediated cardiomyopathy.

Findings:

  • Cardiac angiosarcoma was identified as the underlying cause of the patient's symptoms.
  • This case illustrates an unusual manifestation of cardiac malignancy.

Implications:

  • Early recognition of cardiac tumors is crucial, even with atypical presentations.
  • Understanding rare cardiac pathologies can improve diagnostic accuracy and patient outcomes.