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Related Concept Videos

Exercise and Cardiac Output01:17

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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.
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Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

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Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
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Aortic Regurgitation I: Introduction01:15

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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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Aortic Regurgitation III: Medical Management01:25

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Aortic regurgitation (AR) is when the aortic valve does not close or seal properly, leading to backward blood circulation from the aorta into the left ventricle during diastole. Common causes of AR include rheumatic heart disease, congenital valve defects, and aortic root dilation. Managing AR requires a multifaceted approach to alleviate symptoms, preserve left ventricular function, and address the underlying cause of the regurgitation. Patients with symptomatic AR or significant left...
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Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

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Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
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Aortic Regurgitation IV: Nursing Management01:17

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A nurse managing a patient with aortic regurgitation begins with a comprehensive assessment, including a review of the patient's medical history, family history, and lifestyle factors. During the cardiac examination, the nurse listens for heart sounds and checks for signs of valve abnormalities. The nurse also observes for symptoms such as dyspnea, orthopnea, and paroxysmal nocturnal dyspnea and assesses the patient's endurance and daily activity tolerance.Based on the findings, the nurse...
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Aortic flow is associated with aging and exercise capacity.

Xiaodan Zhao1, Pankaj Garg2,3, Hosamadin Assadi2,3

  • 1National Heart Research Institute Singapore, National Heart Centre Singapore, 5 Hospital Drive, 169609 Singapore, Singapore.

European Heart Journal Open
|August 28, 2023
PubMed
Summary
This summary is machine-generated.

Aortic blood flow eccentricity, measured by cardiovascular magnetic resonance (CMR), increases with age and decreases exercise capacity in healthy adults. These flow changes can help identify individuals at higher risk for reduced physical fitness.

Keywords:
2D phase-contrastAortic flowCardiopulmonary exercise testingFlow displacementHaemodynamics

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Area of Science:

  • Cardiovascular Imaging
  • Physiology
  • Gerontology

Background:

  • Aortic (AO) pathology is linked to altered blood flow patterns.
  • The relationship between AO flow eccentricity and exercise capacity in healthy individuals remains unexplored.
  • Cardiopulmonary exercise testing (CPET) assesses physiological response to exercise.

Purpose of the Study:

  • To investigate the association between aortic flow eccentricity parameters and aging in healthy subjects.
  • To determine the relationship between these flow parameters and exercise capacity assessed by CPET.
  • To evaluate the predictive value of flow eccentricity for identifying reduced exercise capacity.

Main Methods:

  • 169 healthy subjects underwent 2D phase-contrast (PC) cardiovascular magnetic resonance (CMR) and CPET.
  • Aortic (AO) flow parameters including flow displacement (FDsavg, FDlsavg, FDdavg), systolic retrograde flow (SRF), systolic flow reversal ratio (sFRR), and pulse wave velocity (PWV) were quantified.
  • Peak oxygen uptake (PVO2) from CPET served as the primary measure of exercise capacity.

Main Results:

  • All measured AO flow parameters (FDsavg, FDlsavg, FDdavg, SRF, sFRR, PWV) significantly increased with age (P < 0.0001).
  • These parameters also showed a significant inverse correlation with peak oxygen uptake (PVO2) (P < 0.05).
  • Multivariable regression indicated that left ventricular ejection fraction (LVEF), aortic forward flow (FFi), and average flow displacement during systole (FDsavg) could differentiate subjects with high-risk exercise capacity (AUC=0.769).

Conclusions:

  • Aortic flow haemodynamics, specifically eccentricity, change with aging in healthy individuals.
  • These altered flow patterns are associated with reduced exercise capacity.
  • Aortic flow eccentricity parameters may serve as potential biomarkers for assessing cardiovascular health and exercise performance.