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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

3.8K
An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
3.8K
Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

958
Introduction
An electrocardiogram (ECG) is a diagnostic tool for identifying cardiac conditions such as arrhythmias, conduction abnormalities, and myocardial ischemia.
Definition
An electrocardiogram (ECG) visualizes the heart's electrical activity by tracing the electrical movement associated with each heartbeat on a graph or monitor. As the heart beats, an electrical wave passes through it, correlating with the cardiac cycle events.
Parts of an ECG
An ECG utilizes electrodes on the skin...
958
Dysrhythmias V: Evaluating Dysrhythmias01:30

Dysrhythmias V: Evaluating Dysrhythmias

148
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...
148
ECG Interpretation of Rhythms01:24

ECG Interpretation of Rhythms

5.7K
An electrocardiogram (ECG)graphically represents the heart's electrical activity on ECG paper or a monitor.
Components of the Electrocardiogram
The primary components of a normal ECG waveform in Normal sinus rhythm(NSR) include the P wave, PR interval, QRS complex, ST segment, T wave, and occasionally a U wave.
ECG waveforms are divided by vertical and horizontal lines at standard intervals.
The horizontal axis measures time and rate, and the vertical axis measures amplitude or voltage....
5.7K
Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

44
Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
44
Pulse rhythm01:30

Pulse rhythm

992
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
992

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Related Experiment Video

Updated: Oct 17, 2025

Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function
05:03

Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function

Published on: December 11, 2019

8.8K

[The ECG is the key].

Christian Veltmann1, Johanna Müller-Leisse2, Henrike A K Hillmann2

  • 1Hannover Herzrhythmus Centrum, Klinik für Kardiologie und Angiologie, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, 30655, Hannover, Deutschland. veltmann.christian@mh-hannover.de.

Herzschrittmachertherapie & Elektrophysiologie
|October 13, 2021
PubMed
Summary
This summary is machine-generated.

A young man experienced seizure and cardiac arrest due to a rare heart condition. Early electrocardiographic diagnosis and specialized treatment prevented further life-threatening ventricular fibrillation episodes.

Keywords:
Brugada syndromeECGNocturnal respiratory agonyQuinidineSeizure

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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
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Area of Science:

  • Cardiology
  • Neurology
  • Genetics

Background:

  • Sudden cardiac death (SCD) in young adults presents diagnostic challenges.
  • Neurological symptoms can sometimes mask underlying cardiac conditions.

Observation:

  • A 35-year-old man presented with nocturnal respiratory distress and generalized seizure.
  • Initial neurological workup revealed no abnormalities.
  • He later survived sudden cardiac death from ventricular fibrillation without neurological deficit.

Findings:

  • Electrocardiography (ECG) was crucial for diagnosing the underlying cardiac condition.
  • The diagnosis was made after initial unremarkable investigations.

Implications:

  • Highlights the importance of considering cardiac etiologies in unexplained neurological events.
  • Timely ECG diagnosis and targeted pharmacological therapy can prevent recurrent life-threatening arrhythmias.
  • Emphasizes the need for comprehensive diagnostic approaches in patients with syncope and seizures.