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Related Concept Videos

Electrocardiogram01:29

Electrocardiogram

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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...
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Electrocardiogram Fundamentals01:28

Electrocardiogram Fundamentals

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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...
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Cardiomyopathy VII: Pre and Post Operative Nursing Management01:28

Cardiomyopathy VII: Pre and Post Operative Nursing Management

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Patients with hypertrophic cardiomyopathy (HCM) and left ventricular outflow tract (LVOT) obstruction who remain symptomatic despite optimal medical therapy may undergo a septal myectomy (Morrow procedure). This procedure involves excising a portion of the hypertrophied septum below the aortic valve using a heart-lung machine to improve blood flow through the LVOT. Effective preoperative and postoperative nursing management ensures successful patient outcomes, minimizes complications, and...
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Correlation between ECG and Cardiac Cycle01:25

Correlation between ECG and Cardiac Cycle

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The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the cardiac cycle.
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
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Exercise Stress Test01:26

Exercise Stress Test

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Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
547
Cardiac Action Potential01:30

Cardiac Action Potential

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Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
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Confirmation of Myocardial Ischemia and Reperfusion Injury in Mice Using Surface Pad Electrocardiography
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Electrocardiographic changes after breast reduction surgery.

Ayca Ergan Sahin1, Tugce Yasak1, Burak Yılmaz1

  • 1University of Health Sciences, Prof. Dr. Cemil Tascioglu City Hospital, Istanbul, Turkey.

Journal of Plastic Surgery and Hand Surgery
|March 21, 2022
PubMed
Summary
This summary is machine-generated.

Breast reduction surgery significantly improves cardiac conduction in women with macromastia. Electrocardiography (ECG) showed reduced atrial and ventricular conduction times after the procedure, indicating positive cardiac effects beyond improved posture.

Keywords:
Breast surgeryP waveT wavebreastbreast reductionelectrocardiography

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Area of Science:

  • Cardiology
  • Plastic Surgery
  • Medical Imaging

Background:

  • Macromastia often causes postural issues and reduced mobility.
  • Body habitus changes from macromastia can affect electrocardiography (ECG) readings.
  • Breast reduction surgery (BRS) is a primary treatment for macromastia.

Purpose of the Study:

  • To assess the impact of BRS on ECG parameters in patients with macromastia.
  • To evaluate changes in atrial and ventricular conduction post-BRS.
  • To determine if BRS offers cardiac benefits beyond symptom relief.

Main Methods:

  • Retrospective analysis of ECGs from 33 female patients before and 6 months after BRS.
  • Exclusion of patients with known cardiac diseases or arrhythmias.
  • Measurement of atrial conduction (PR duration, Pmax duration, P wave dispersion) and ventricular conduction (TPe duration, TPe/QT, TPe/QTc ratios).

Main Results:

  • Significant decreases in PR duration, Pmax duration, and P wave dispersion were observed post-BRS (p<.001).
  • Significant reductions in TPe duration (p<.001), TPe/QT ratio (p=.013), and TPe/QTc ratio (p=.005) were noted.
  • BRS led to notable improvements in both atrial and ventricular conduction parameters.

Conclusions:

  • BRS positively impacts cardiac conduction in patients with macromastia.
  • The procedure improves ECG parameters related to atrial and ventricular electrical activity.
  • BRS offers benefits for cardiac conduction in addition to improving posture and mobility.