What question did this study set out to answer?

This study investigates how anaerobic metabolism contributes to mild physical activity and its relationship with oxygen consumption and cardiac output, especially in congestive heart failure.

November 1, 1958Journal of Clinical InvestigationOpen Access

The Role of Anaerobic Metabolism in the Performance of Mild Muscular Work. I. Relationship to Oxygen Consumption and Cardiac Output, and the Effect of Congestive Heart Failure1

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Why the study?

Does mild muscular work induce a higher anaerobic metabolic rate in patients with congestive heart failure compared to normal subjects?

Population

38 subjects total: 14 normal subjects and 24 patients with clinical congestive heart failure. HF etiologies…

Comparison

Mild muscular work consisting of a walking… vs Normal subjects without heart failure undergoing…

Design

Cross-sectional

Authors

WHWilliam E. HuckabeeBoston University WJWalter E. JudsonIndiana University School of Medicine

Discussion

Member takes

Implication

May indicate tissue hypoxia in HF during mild exertion; hypothesis-generating for anaerobic targets, needs prospective validation.

Key Points

This study investigates how anaerobic metabolism contributes to mild physical activity and its relationship with oxygen consumption and cardiac output, especially in congestive heart failure.
Evaluated anaerobic energy processes through oxygen debt measurements.
Assessed cardiac output and oxygen consumption during mild muscular work.
Analyzed differences in anaerobic metabolism in patients with congestive heart failure.
Observed increased anaerobic metabolism in participants with congestive heart failure during mild exertion.
Findings suggest a critical relationship between oxygen transport limitations and tissue anaerobic energy supply.

Structured PICO

Does mild muscular work induce a higher anaerobic metabolic rate in patients with congestive heart failure compared to normal subjects?

Population

38 subjects total: 14 normal subjects (hospital patients recovering from minor infectious diseases or seeking diagnostic investigation with no symptoms/abnormality) and 24 patients with clinical congestive heart failure (Class II to IV, all with dyspnea, 13 with edema). HF etiologies included essential hypertension (n=6), mitral stenosis (n=5), mitral regurgitation (n=2), aortic valvular disease (n=4), and arteriosclerotic heart disease (n=7).

Intervention

Mild muscular work consisting of a walking motion of the legs at a constant rate while supine for 5 to 14 minutes.

Comparator

Normal subjects without heart failure undergoing the same exercise protocol.

Outcome

Anaerobic metabolic rate (AMR) calculated from excess lactate (XL) accumulation during steady state of exercise.surrogate

Patients with congestive heart failure rely significantly more on anaerobic metabolism during mild exercise compared to normal subjects, indicating tissue hypoxia despite compensatory mechanisms.

Cite This Study

Huckabee et al. (1958) studied this question.

synapsesocial.com/papers/6a724468b5c1fe5ca9dff79d https://doi.org/10.1172/jci103751

Topics

Heart failure HFrEF treatment

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The Role of Anaerobic Metabolism in the Performance of Mild Muscular Work. I. Relationship to Oxygen Consumption and Cardiac Output, and the Effect of Congestive Heart Failure1

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Topics

The Role of Anaerobic Metabolism in the Performance of Mild Muscular Work. I. Relationship to Oxygen Consumption and Cardiac Output, and the Effect of Congestive Heart Failure1

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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Topics

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