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ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias01:25

ECG Interpretation of Arrhythmias II: Atrial, Junctional and Ventricular Arrhythmias

160
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...
160
Dysrhythmias III: Characteristics of Dysrhythmias01:29

Dysrhythmias III: Characteristics of Dysrhythmias

113
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...
113
Dysrhythmias IV: Characteristics of Bradyarrhythmias01:18

Dysrhythmias IV: Characteristics of Bradyarrhythmias

118
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...
118
Disturbances in Heart Rhythm01:29

Disturbances in Heart Rhythm

1.2K
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...
1.2K
Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

8.3K
The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the cardiac cycle.
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
8.3K
Dysrhythmias II: Classification of Tachyarrhythmias01:28

Dysrhythmias II: Classification of Tachyarrhythmias

135
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...
135

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関連する実験動画

Updated: Sep 9, 2025

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
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Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation

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心房細動患者におけるP波異常の流行と進行

Arto Relander1, Johanna Kääriä1, Samuli Jaakkola1

  • 1Heart Center, Turku University Hospital and University of Turku, Turku, Finland.

Heart rhythm
|August 31, 2025
PubMed
まとめ

P波異常 (PWA) は,老化や心血管疾患によって引き起こされ,心房細動 (AF) の患者に頻繁に発生し,急速に進行します. これらの心電図の変化は,AFの高い流行率と進行率を示しています.

キーワード:
アトリアル心筋病心房細動エレクトロカーディオグラム間閉塞P 波P端の力

さらに関連する動画

Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
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Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation

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The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
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The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation

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関連する実験動画

Last Updated: Sep 9, 2025

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation
28:13

Catheter Ablation in Combination With Left Atrial Appendage Closure for Atrial Fibrillation

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Estimating Bilateral Atrial Function by Cardiovascular Magnetic Resonance Feature Tracking in Patients with Paroxysmal Atrial Fibrillation
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The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
23:33

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation

Published on: February 28, 2012

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科学分野:

  • 心臓病科
  • エレクトロカルジオグラフィー

背景:

  • P波指数は心電図 (ECG) の心血管疾患である心房細動 (AF) や脳卒中に関連しています.
  • これらのP波異常 (PWA) の安定性および進行に関するデータは限られている.

研究 の 目的:

  • 心房細動 (AF) の患者におけるP波異常 (PWA) の流行,進行,およびリスク因子を調査する.

主な方法:

  • 急性AFのために心臓転換 (CV) を受けた1316人の3つのシヌスリズムECGを分析した.
  • P-波の持続時間,P-末端の力,心房間ブロックの基準,およびP-波の形状に基づいた中等および広範なPWAを定義します.

主要な成果:

  • 正常P波から中度および広範囲のPWAへの有意な進行は,心臓転換前および後の両方とも観察されました.
  • フォローアップでは38. 7%が中程度のPWAと33. 5%が広範囲のPWAでした.
  • 持続的な/ 進行的なPWAの独立リスク要因には,年齢,心不全,高血圧,血管疾患,以前のAF,頻繁なCV,左心室高縮,および広範なQRS複合体が含まれています.

結論:

  • P- 波異常 (PWA) は高い頻度で,AF患者では急速に進行する.
  • 進行は主に老化,慢性心血管疾患,再発性AFエピソードによって影響されます.