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Related Concept Videos

The Arch of Aorta01:10

The Arch of Aorta

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The coronary arteries, originating from the ascending aorta, bifurcate from two sinuses located within the ascending aorta. Positioned just above the aortic semilunar valve, these sinuses house essential aortic baroreceptors and chemoreceptors, crucial for maintaining cardiac function. The left coronary artery and the right coronary artery branch off from the left posterior and anterior aortic sinuses, respectively.
Encircling the heart, the coronary arteries form a ring-like structure before...
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Aortic Regurgitation I: Introduction01:15

Aortic Regurgitation I: Introduction

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IntroductionAortic regurgitation is characterized by the backward flow of blood from the aorta into the left ventricle during diastole and arises from the improper closure of the aortic valve. This condition results in left ventricular volume overload and can stem from both acute and chronic etiologies, each contributing uniquely to the disease's progression and symptomatology.Acute and Chronic CausesAcute aortic regurgitation often results from events that suddenly impair the integrity of the...
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Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

Cardiac Output II: Effect of Stroke Volume on Cardiac Output

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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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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...
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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...
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Related Experiment Video

Updated: Feb 13, 2026

O-Ring Aortic Banding Versus Traditional Transverse Aortic Constriction for Modeling Pressure Overload-Induced Cardiac Hypertrophy
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O-Ring Aortic Banding Versus Traditional Transverse Aortic Constriction for Modeling Pressure Overload-Induced Cardiac Hypertrophy

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Aortic Arch. The Final Frontier in Cardiac Surgery.

Dimos Karangelis1,2, Apostolos Roubelakis1, Dimitris Mikroulis3

  • 1Department of Cardiac Surgery, St Michael's Hospital , Toronto , Canada.

Journal of Investigative Surgery : the Official Journal of the Academy of Surgical Research
|March 21, 2018
PubMed
Summary

Surgical management of aortic arch pathologies is evolving. Novel techniques like frozen elephant trunk and TEVAR aim to simplify complex aortic arch repairs, often enabling single-stage operations for better outcomes.

Keywords:
TEVARaneurysmaortic archcardiac surgeryhybrid stent

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Related Experiment Videos

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Surgically Induced Cardiac Volume Overload by Aortic Regurgitation in Mouse
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Area of Science:

  • Cardiovascular Surgery
  • Vascular Surgery
  • Thoracic Surgery

Background:

  • Aortic arch pathologies, including acute aortic dissection and aneurysms, pose significant surgical challenges.
  • Traditional surgical approaches often involve complex, multi-stage procedures.

Purpose of the Study:

  • To review and evaluate contemporary surgical alternatives for complex aortic arch and proximal descending aorta pathologies.
  • To focus on approaches that simplify operations and reduce surgical time, particularly single-stage procedures.

Main Methods:

  • Review of emerging surgical techniques and prostheses for aortic arch disease.
  • Evaluation of the classic elephant trunk technique, frozen elephant trunk, thoracic endovascular aortic repair (TEVAR), and hybrid open branched stent grafts.

Main Results:

  • Emerging techniques aim to simplify aortic arch surgery and decrease operative time.
  • Novel approaches like frozen elephant trunk and TEVAR offer alternatives to traditional methods.
  • Contemporary strategies increasingly favor single-stage operations for extensive thoracic aortic disease.

Conclusions:

  • Advances in surgical techniques and prostheses have expanded therapeutic options for aortic arch pathologies.
  • Modern approaches, including TEVAR and frozen elephant trunk, facilitate simpler and potentially faster surgical interventions.
  • The trend towards single-stage operations represents a significant advancement in managing complex aortic arch and proximal descending aorta conditions.