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Related Concept Videos

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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Cancer survival analysis focuses on quantifying and interpreting the time from a key starting point, such as diagnosis or the initiation of treatment, to a specific endpoint, such as remission or death. This analysis provides critical insights into treatment effectiveness and factors that influence patient outcomes, helping to shape clinical decisions and guide prognostic evaluations. A cornerstone of oncology research, survival analysis tackles the challenges of skewed, non-normally...
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Cardiac Output I:Effect of Heart Rate on Cardiac Output01:19

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Cardiac Output
Cardiac output (CO) refers to the total amount of blood ejected by one of the ventricles in liters per minute (L/min). In a resting adult, CO ranges from 5 to 6 L/min, adjusting according to the body's metabolic requirements.
Effect of Heart Rate on Cardiac Output
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Heart Failure III: Clinical Manifestations01:26

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Heart failure (HF) manifests primarily as dyspnea, fatigue, and fluid retention, resulting in peripheral and pulmonary edema. Symptoms may vary depending on which ventricle is more affected, left or right.Left-Sided Heart FailureAlso known as left ventricular failure, this condition results from the left ventricle's inability to fill or eject sufficient blood into the systemic circulation. It leads to pulmonary congestion, which occurs when the left ventricle fails to eject blood effectively...
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Pulse rhythm01:30

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Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
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Heart failure can be classified in various ways, with the most common classifications based on physical activity limitations, disease progression, severity, and treatment strategies.The Functional Classification of Heart Failure divides patients into four categories based on physical activity limitation due to symptom burden.Class I: Patients in this class have cardiac disease but no physical activity limitations. Ordinary activities like walking, climbing stairs, or routine tasks do not cause...
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Prognostic Value of Heart Rate Variability in Patients With Cancer.

Ying Guo1, Shalini Koshy, David Hui

  • 1*Department of Palliative Care and Rehabilitation Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, U.S.A.; †Corrona Research Foundation, Albany, New York, U.S.A.; ‡Department of Physical Medicine and Rehabilitation, Dicle University Faculty of Medicine, Diyarbakir, Turkey; and §Department of Cardiology, The University of Texas MD Anderson Cancer Center, Houston, TX, U.S.A.

Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society
|December 3, 2015
PubMed
Summary
This summary is machine-generated.

Autonomic dysfunction, measured by decreased heart rate variability (heart rate variability < 70 milliseconds), is linked to shorter survival in advanced cancer patients. This finding highlights HRV as a potential prognostic marker in oncology.

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Autonomic Function Following Concussion in Youth Athletes: An Exploration of Heart Rate Variability Using 24-hour Recording Methodology
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Area of Science:

  • Oncology
  • Cardiology
  • Autonomic Nervous System

Background:

  • Autonomic dysfunction is a known predictor of reduced survival in advanced cancer.
  • Heart rate variability (HRV) quantifies autonomic function.

Purpose of the Study:

  • To investigate the association between HRV and survival in a large cohort of cancer patients.
  • To determine if decreased HRV is an independent prognostic factor for survival in cancer.

Main Methods:

  • Retrospective analysis of 651 cancer patients with 20-24 hour ambulatory ECG monitoring.
  • Calculation of time-domain HRV (SDNN) using power spectral analysis.
  • Comparison of survival rates between patients with SDNN ≥ 70 ms and SDNN < 70 ms.

Main Results:

  • Patients with SDNN < 70 ms had significantly shorter survival (18.7 weeks) compared to those with SDNN ≥ 70 ms (78.9 weeks).
  • Multivariate analysis confirmed SDNN < 70 ms as a significant independent predictor of survival (HR 1.9).
  • Group with lower HRV also had higher rates of male patients, hematological malignancies, and SSRI antidepressant use.

Conclusions:

  • Decreased heart rate variability (SDNN < 70 ms) is associated with shorter survival in cancer patients.
  • HRV may serve as a valuable prognostic indicator in advanced cancer care.