Tag: QRS complex
The Early Commercial Electrocardiograph: History and Physiology of Cardiac Diagnostics
This historical photograph illustrates a pivotal moment in the evolution of cardiology, depicting an early commercial electrocardiograph manufactured by the Cambridge Scientific Instrument Company around 1911. Based on the groundbreaking standards established by Willem Einthoven, this massive apparatus represents the transition of cardiac monitoring from experimental physics laboratories to clinical application. The image displays a subject with limbs immersed in saline solution, a primitive yet effective method for conducting the heart's electrical signals to the string galvanometer, laying the foundational principles for the modern 12-lead ECG used in hospitals today.
Decoding Atrioventricular Blocks: An ECG Guide to Cardiac Conduction Disorders
Explore the characteristic electrocardiogram (ECG) patterns of atrioventricular (AV) blocks, organized by degree. This article provides a detailed explanation of First-Degree, Second-Degree (Mobitz I and II, 2:1), and Third-Degree AV blocks, crucial for accurate diagnosis and management of these cardiac conduction disorders.
Understanding Sinus Bradycardia: An ECG Interpretation Guide
Explore the characteristics of sinus bradycardia on an electrocardiogram (ECG), focusing on its presentation in Lead II and typical heart rate. This article provides detailed insights into this common cardiac rhythm, its physiological causes, and when it may signify a clinical concern.
Understanding ECGs: Left Bundle Branch Block, Right Axis Deviation, and Post-Transplant Findings
Explore the complexities of electrocardiograms, focusing on Left Bundle Branch Block (LBBB), Right Axis Deviation (RAD), and unique characteristics of post-cardiac transplant ECGs. This article provides detailed insights into these specific findings, their clinical implications, and their significance in cardiac diagnostics.
Decoding the Heart’s Rhythm: A Comprehensive Guide to the Cardiac Cycle
Delve into the intricate, rhythmic sequence of events that constitute the human cardiac cycle, as vividly described in this detailed diagram. This guide will illuminate how the heart efficiently pumps blood through a continuous process of contraction and relaxation, ensuring vital oxygen and nutrients reach every part of the body. Understanding the phases of the cardiac cycle is fundamental to comprehending heart function and identifying various cardiovascular conditions.
