Free Course Image ECG Interpretation and Clinical Application: Electrocardiogram Essentials

Free online courseECG Interpretation and Clinical Application: Electrocardiogram Essentials

Duration of the online course: 9 hours and 21 minutes

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Free ECG essentials course: learn lead systems, waveforms, arrhythmias, blocks, ischemia/MI patterns, electrolyte and drug effects, and pacemaker rhythms.

In this free course, learn about

  • ECG Fundamentals: Conduction, Leads, and Recording
  • ECG Waveforms, Intervals, and Electrical Axis
  • Electrophysiology and Arrhythmia Mechanisms
  • Ischemia and Infarction: Pathophysiology and ECG Correlates
  • Medications, Preparation, and ECG Quality
  • Bradyarrhythmias, Tachyarrhythmias, and Conduction Blocks
  • Structural and Metabolic ECG Changes
  • Clinical ECG Interpretation: Ischemia, Infarction, and Special Findings
  • Pacemaker ECG and Device Rhythms

Course Description

ECG Interpretation and Clinical Application: Electrocardiogram Essentials is a free online course from NPTEL designed for learners who want to understand how to read and apply ECG findings in real clinical contexts. It builds a clear foundation for interpreting cardiac electrical activity, connecting core principles to practical decision-making in healthcare settings.

You will explore how the heart’s conduction system generates recognizable patterns on the electrocardiogram and how lead placement influences what you see. The course clarifies waveforms, intervals, and segments, and introduces vector concepts to strengthen your ability to reason through complex tracings rather than relying on memorization.

As you progress, the material links cellular action potentials to rhythm disturbances, helping you recognize common sinus rhythms, bradyarrhythmias, and structured approaches to tachyarrhythmias. You will also learn to identify AV blocks and bundle branch blocks, and understand how chamber enlargement and heart failure can alter ECG patterns.

Clinical application is emphasized through recognition of ischemia and injury patterns, ECG changes associated with myocardial infarction, and other important findings that affect patient care. Additional sections address drug-related ECG effects, electrolyte abnormalities, pacemaker rhythms, and best practices for patient identification, preparation, and accurate ECG recording and interpretation.

Course content

  • Video class: Introduction - Electrocardiogram - Interpretation and application in clinical practice 04m
  • Exercise: Which description best summarizes the electrocardiogram (ECG) as presented in the course introduction?
  • Video class: Basic Conduction of Heart 29m
  • Exercise: Which ECG waveform primarily represents ventricular depolarization?
  • Video class: ECG Lead system 23m
  • Exercise: Which group of ECG leads are considered contiguous septal leads in the standard 12‑lead system?
  • Video class: Recording of a Standard ECG (Lead placements 26m
  • Exercise: When calibrating a standard ECG machine, what should a 1 mV calibration signal produce on the ECG paper?
  • Video class: Waveforms, inervals and segments 37m
  • Exercise: In ECG interpretation, what determines whether a depolarization wave is recorded as an upward (positive) or downward (negative) deflection in a given lead?
  • Video class: Vector Electrocardiography 28m
  • Exercise: Using the quadrant method for QRS axis determination, what does it suggest when the QRS complex is negative in lead I and positive in lead aVF?
  • Video class: From Action Potentials to Arrhythmias 21m
  • Exercise: In accelerated conduction due to a paranodal (bypass) tract, what is the classical ECG finding?
  • Video class: Pathophysiology, Myocardial Ischemia / Injury 42m
  • Exercise: Which change most directly reduces subendocardial coronary blood flow during tachycardia, increasing the risk of myocardial ischemia?
  • Video class: Myocardial Infarction (MI), Pathophysiology 33m
  • Exercise: Which mechanism accounts for about 90% of myocardial infarctions?
  • Video class: Drug effects on ECG 37m
  • Exercise: Which ECG change is most characteristically associated with many non-cardiac medications (e.g., certain antibiotics, antifungals, antidepressants, antipsychotics)?
  • Video class: Patient identification , preparation and interpretation of ECG 17m
  • Exercise: Which chest lead placement is correct for V4 in a standard 12-lead ECG?
  • Video class: Sinus rhythms and Bradyarrythmias 20m
  • Exercise: Which ECG finding best differentiates sinoatrial (SA) exit block from sinus pause?
  • Video class: Approach to tachyarrhythmias 30m
  • Exercise: Which QRS duration criterion defines a wide-complex (broad-complex) tachyarrhythmia?
  • Video class: AV Blocks and Bundle Branch Block 26m
  • Exercise: Which ECG feature best differentiates Mobitz type 1 (Wenckebach) from Mobitz type 2 second-degree AV block?
  • Video class: Chamber enlargement and Heart Failure 29m
  • Exercise: Which ECG voltage criterion supports a diagnosis of left ventricular hypertrophy (LVH)?
  • Video class: Electrolyte Abnormalities on ECG 32m
  • Exercise: Which electrolyte abnormality most directly affects the ST segment and thereby alters the QT interval?
  • Video class: Recognizing signs and ECG changes in Myocardial Ischemia/Injury 24m
  • Exercise: Which ECG pattern most strongly favors myocardial ischemia rather than a normal variant?
  • Video class: ECG changes in myocardial infarction 36m
  • Exercise: Which ECG finding suggests a more severe non-ST elevation myocardial infarction (NSTEMI) that warrants early intervention?
  • Video class: Miscellaneous ECG findings 32m
  • Exercise: In acute pulmonary embolism, which ECG finding is described as the most specific?
  • Video class: Pacemaker Rhythms 26m
  • Exercise: In pacemaker electrocardiography, what does applying a magnet over a pacemaker typically do?

This free course includes:

9 hours and 21 minutes of online video course

Digital certificate of course completion (Free)

Exercises to train your knowledge

100% free, from content to certificate

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