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Related Concept Videos

Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

Cardiac Output II: Effect of Stroke Volume on Cardiac Output

3.2K
Cardiac output (CO), the amount of blood the heart pumps per minute, is a parameter in cardiovascular physiology determined by stroke volume and heart rate. Stroke volume, the amount of blood pushed from one of the ventricles per heartbeat, is influenced by preload, afterload, and contractility.
Preload
Preload refers to the initial elongation of the cardiac myocytes before contraction and is related to the volume of blood filling the heart at the end of diastole, or end-diastolic volume. The...
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Cardiac Output I:Effect of Heart Rate on Cardiac Output01:19

Cardiac Output I:Effect of Heart Rate on Cardiac Output

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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
Cardiac output adapts to metabolic demands during stress, physical activity, or illness. The autonomic nervous system regulates heart rate via the sinoatrial node. The parasympathetic nervous system decreases heart...
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Cardiac Cycle01:29

Cardiac Cycle

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The cardiac cycle refers to the sequence of events that occur in the heart from the beginning of one heartbeat to the next. It's characterized by alternating periods of contraction (systole) and relaxation (diastole) of the heart muscles.
During the cardiac cycle, blood flow through the heart is regulated entirely by changing pressure gradients. This sequence of events begins with the heart in a state of total relaxation, known as mid-to-late diastole, during which blood passively flows from...
12.2K
The Cardiac Cycle01:13

The Cardiac Cycle

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The heart beats rhythmically in a sequence called the cardiac cycle—a rapid coordination of contraction (systole) and relaxation (diastole).
The Process
Electrical signals—sent from the sinoatrial (SA) node in the right atrial wall to the atrioventricular (AV) node between the right atrium and right ventricle—cause both atria to simultaneously contract. When the signal reaches the AV node, it pauses for approximately a tenth of a second, allowing the atria to contract and...
97.8K
Exercise and Cardiac Output01:17

Exercise and Cardiac Output

1.8K
Regular physical activity is essential for maintaining cardiovascular health, with aerobic exercises being particularly effective. According to the American Heart Association, 150 minutes of moderate to intense aerobic exercise per week is recommended for a healthy heart. Aerobic activities may include brisk walking, running, bicycling, cross-country skiing, and swimming, ideally performed three to five times per week.
Sustained exercise increases the muscles' oxygen demand, which can be...
1.8K
Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

2.3K
The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send...
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Related Experiment Video

Updated: Jan 21, 2026

Generation of Induced Pluripotent Stem Cells from Human Melanoma Tumor-infiltrating Lymphocytes
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Extensive cardiac infiltrative melanoma.

Marco Morosin1, Alessia Azzu1, Massimo Capoccia2

  • 1Adult Intensive Care Unit, Royal Brompton Hospital, London, United Kingdom.

Journal of Cardiac Surgery
|August 3, 2019
PubMed
Summary

This case study details a rare instance of metastatic melanoma affecting the heart, forming a large right atrial mass. The extensive tumor infiltration made complete surgical removal impossible, highlighting challenges in managing secondary cardiac tumors.

Keywords:
cardiac tumormelanoma

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Area of Science:

  • Cardiology
  • Oncology
  • Pathology

Background:

  • Metastatic melanoma can rarely involve the heart, presenting diagnostic and therapeutic challenges.
  • Secondary cardiac tumors are infrequently encountered in clinical practice, necessitating increased awareness.

Observation:

  • A 66-year-old patient presented with cardiac metastasis from melanoma.
  • A large right atrial mass was identified, extensively infiltrating cardiac structures including the interatrial septum, coronary sinus, mitral annulus, and right ventricle.
  • The tumor burden precluded complete surgical resection.

Findings:

  • Extensive cardiac infiltration by metastatic melanoma.
  • Inoperable right atrial mass due to tumor extent.
  • Demonstration of melanoma's potential for widespread cardiac metastasis.

Implications:

  • This case underscores the importance of considering cardiac metastasis in melanoma patients with unexplained symptoms.
  • Highlights the need for multidisciplinary approaches in managing complex secondary cardiac tumors.
  • Serves as an educational resource for clinicians regarding rare cardiac oncological emergencies.