"Measurement of Cardiac Output and Changes which Occur During Training

Measurement of cardiac output during exercise.

T here are a variety of reasons why the clinician would want to measure cardiac output. In the intensive care unit (ICU), life-threatening hypoperfu-sion states may be subject to manipulation. Outside the ICU, low cardiac output may limit the quality of life. A functional definition of heart failure is a cardiac output insufficient for metabolic needs. Implicit in this is the magnitude of these...

Measurement of cardiac output.

Float catheterisation of the pulmonary artery was described in The Lancet by Dr R D Bradley (as he then was) in 1964 at a time when invasive circulatory monitoring was almost non-existent outside cardiac surgical units, and ‘intensive care’ was a term barely in use. Cardiac catheterisation was laboratory based and required radiological control: management of acute circulatory crises relied on c...

Doppler measurement of cardiac output during cardiopulmonary resuscitation.

OBJECTIVE To estimate the cardiac output produced by external cardiac compression during standard cardiopulmonary resuscitation performed by two groups of operators with different levels of experience and training. METHODS Cardiac output was measured by Doppler aortovelography. All patients included in the study had necropsy examinations. Only patients without evidence of pulmonary embolism, ...

Cardiac output during labour.

Serial measurements of cardiac output and mean arterial pressure were performed in 15 women during the first stage of labour and at one and 24 hours after delivery. Cardiac output was measured by Doppler and cross sectional echocardiography at the pulmonary valve. Basal cardiac output (between uterine contractions) increased from a prelabour mean of 6.99 l/min to 7.88 l/min at greater than or e...

Does nonchemical inhibition of respiratory output occur during mechanical ventilation?