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Related Concept Videos

Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

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Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
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Factors Influencing Heart Rate01:30

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The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
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Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations01:19

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The pathophysiology of Acute Coronary Syndrome [ACD] involves several key processes:The main underlying cause of ACD is atherosclerosis, a chronic inflammatory disease characterized by the buildup of lipid-laden plaques within the coronary arteries.As the atherosclerotic plaque grows in the coronary artery, it may become unstable due to the formation of a lipid-rich core and a thin fibrous cap. Inflammatory cells within the plaque, such as macrophages, secrete enzymes that degrade the...
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Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

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Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
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Acute Coronary Syndrome I: Introduction01:30

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Acute Coronary Syndrome (ACS) encompasses a spectrum of heart conditions caused by sudden obstruction of coronary arteries, typically resulting from the rupture of an atherosclerotic plaque and subsequent thrombus (blood clot) formation. This obstruction can lead to partial or complete blockage of blood flow, causing varying degrees of myocardial ischemia or infarction.ACS includes the following clinical entities:Unstable Angina (UA)Non-ST-Elevation Myocardial Infarction (NSTEMI)ST-Elevation...
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Acute Coronary Syndrome V: Nursing Management01:26

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Nursing Assessment:Nursing management of acute coronary syndrome (ACS) involves taking the patient's history, focusing on primary complaints such as chest pain, dyspnea, and excessive sweating (diaphoresis), as well as other symptoms like back or jaw pain, nausea, vomiting, palpitations, dizziness, and fatigue. The nurse also reviews the patient's history of cardiac events, risk factors such as hypertension, diabetes, smoking, family history, and current medications.In the objective assessment,...
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Related Experiment Video

Updated: Mar 29, 2026

Calculating Heart Rate Variability from ECG Data from Youth with Cerebral Palsy During Active Video Game Sessions
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Short-Term Heart Rate Variability Dynamics and Mortality Risk After Acute Coronary Syndrome.

Nikola Marković1, Maša Petrović1, Silvana Babić2

  • 1Institute for Cardiovascular Diseases "Dedinje", 11000 Belgrade, Serbia.

Diagnostics (Basel, Switzerland)
|March 28, 2026
PubMed
Summary
This summary is machine-generated.

Short-term heart rate variability (HRV) changes after acute coronary syndrome (ACS) predict mortality. Declines in HRV parameters, like LF power, indicate autonomic imbalance and poor prognosis.

Keywords:
acute coronary syndromeautonomic nervous systemelectrocardiologyheart rate variabilityshort-term HRV

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Area of Science:

  • Cardiology
  • Autonomic Nervous System Research
  • Clinical Prognostics

Background:

  • Heart rate variability (HRV) is a key non-invasive indicator of autonomic nervous system (ANS) function.
  • HRV holds prognostic significance in patients post-acute coronary syndrome (ACS).
  • The clinical importance of short-term HRV changes after ACS requires further definition.

Purpose of the Study:

  • To investigate short-term HRV dynamics following acute myocardial infarction (AMI).
  • To assess the association between temporal HRV changes and overall mortality in ACS patients.

Main Methods:

  • Retrospective-prospective study of 230 acute myocardial infarction patients.
  • Acquisition of 5-minute resting ECG recordings on day 1 and day 21 post-MI.
  • Analysis of time- and frequency-domain HRV parameters, including delta values, with survival analysis using Kaplan-Meier and Cox regression.

Main Results:

  • Patients who died showed lower HRV on day 21 and greater declines in specific HRV parameters.
  • Decreased low frequency (LF) power (ΔLF) and shorter RR intervals independently predicted overall mortality in multivariable analysis.

Conclusions:

  • Short-term HRV offers a practical bedside tool for assessing autonomic function post-ACS.
  • Unfavorable temporal HRV changes suggest persistent autonomic imbalance and provide additional prognostic information.
  • Further validation in larger, contemporary cohorts is warranted.