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Electrocardiogram

Electrocardiogram

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 the T...

Electrocardiogram Fundamentals

Electrocardiogram Fundamentals

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 to...

ECG Interpretation of Rhythms

ECG Interpretation of Rhythms

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. When...

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

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

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...

Pharmacodynamics in Geriatric Patients: Effects of Age

Pharmacodynamics in Geriatric Patients: Effects of Age

Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

ECG Interpretation of Arrhythmias I: Sinus Arrhythmias

Arrhythmias are disturbances in the heart's rhythm that lead to abnormal heartbeats. These irregularities can originate from different parts of the heart and are classified based on their origin and nature.
Types of Arrhythmias
Sinus Node Arrhythmias
Sinus Bradycardia: Originating from the sinoatrial (SA) node, sinus bradycardia involves slower impulses, resulting in a heart rate of less than 60 beats per minute (bpm). Causes include sleep, vagal stimulation, beta-blockers, hypothyroidism, and...

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Related Experiment Video

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Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice

Analyzing Long-Term Electrocardiography Recordings to Detect Arrhythmias in Mice

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ECG findings in elderly.

Krishna Chandra Devkota¹, Suman Bahadur Thapamagar, Bidesh Bista

¹Department of Medicine, Nepal Medical College, Attarkhel, Jorpati, Kathmandu. dr.devkota@yahoo.com

Nepal Medical College Journal : NMCJ

|October 5, 2006

Summary

This study evaluated electrocardiograms (ECGs) in healthy Nepali elderly individuals. Findings show a significant portion had normal ECGs, with minor abnormalities being most common in this aging population.

Area of Science:

Gerontology
Cardiology
Public Health

Background:

Limited research exists on electrocardiogram (ECG) findings in the elderly population in Nepal.
Understanding cardiac health in aging populations is crucial for targeted healthcare strategies.

Purpose of the Study:

To evaluate the electrocardiogram (ECG) findings in apparently healthy geriatric subjects in Nepal.
To establish baseline ECG parameters for healthy aging in the Nepali elderly.

Main Methods:

Electrocardiogram (ECG) recordings were analyzed from 171 apparently healthy individuals aged over 60 years.
Participants were recruited from various geriatric homes in Nepal.
Data included demographic information and detailed ECG interpretations.

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Main Results:

38.6% of the study population exhibited entirely normal ECGs.
The most frequent abnormalities included sinus bradycardia (18.1%), left ventricular hypertrophy (LVH) (14.6%), and premature supraventricular beats (9.4%).
Other findings included T wave changes, right bundle branch block, poor R wave progression, and right atrial overload.

Conclusions:

A substantial proportion of healthy elderly individuals in Nepal have normal ECGs.
The majority of ECG abnormalities observed were minor, suggesting a generally good cardiac status in this cohort.
These findings provide valuable data for future research on healthy aging in Nepal and inform clinical practice regarding geriatric cardiac assessments.