ECG Curve Mechanism
Understand the main ventricular vector, ECG leads, electrical axis, and the types of ECG deflections—positive, negative, isoelectric, and biphasic.
Teaching Medicine - Tutorial: Basic Electric Stuff
The 2 black dots are the 2 ECG electrodes which together make up one ECG lead. The electrode with the + sign is the "positive" electrode and by convention, an electrical charge travelling …
Understanding the Normal ECG | Thoracic Key
Jun 11, 2016 · Rather, if you understand a few basic ECG principles and the sequence of atrial and ventricular depolarization, you can predict the normal ECG patterns in each lead. As the …
Electrocardiogram (ECG) - Cardiovascular - Medbullets Step 1
Jul 4, 2019 · the ECG records the sum of the electrical forces that flow through the heart the ECG deflections depend on how these electrical forces align to a specific ECG lead e.g., lead aVR, …
Positive and negative ECG waveforms for students and new ...
Nov 28, 2023 · The graphic above illustrates one of the first basic rules of ECG interpretation. That is, a positive impulse (or wave of depolarization) traveling toward a positive electrode …
The QRS complex: ECG features of the Q-wave, R-wave, S-wave ...
A deflection is only referred to as a wave if it passes the baseline. If the first wave is negative then it is referred to as Q-wave. If the first wave is not negative, then the QRS complex does not …
The ECG Signal: What Do the Waves and Intervals Mean?
Jul 23, 2025 · Decoding the Waves and Intervals The electrical journey through the heart is graphically represented on an ECG as a series of distinct waves and intervals, each …
Conquering the ECG - Cardiology Explained - NCBI Bookshelf
Besides the stethoscope, the electrocardiogram (ECG) is the oldest and most enduring tool of the cardiologist. A basic knowledge of the ECG will enhance the understanding of cardiology (not …