End-tidal CO2 pressure decreases during exercise in cardiac patients

End-tidal CO2 pressure decreases during exercise in cardiac patients: association with severity of heart failure and cardiac output reserve.

OBJECTIVES We measured end-tidal CO2 pressure (PETCO2) during exercise and investigated the relationship between PETCO2 and exercise capacity, ventilatory parameters and cardiac output to determine the mechanism(s) of changes in this parameter. BACKGROUND It is unclear whether PETCO2 is abnormal at rest and during exercise in cardiac patients. METHODS Cardiac patients (n = 112) and normal i...

End-tidal CO2 pressure and cardiac performance during exercise in heart failure.

INTRODUCTION In patients with heart failure (HF), end-tidal CO2 pressure (PetCO2) is related to ventricular function at rest and has been shown to predict prognosis. However, little is known about the association between ventricular performance and PetCO2 responses to exercise. METHODS Forty-eight patients with HF and 13 normal subjects underwent cardiopulmonary exercise testing (CPX), while ...

Early aerobic training increases end-tidal CO2 pressure during exercise in patients after acute myocardial infarction.

BACKGROUND End-tidal CO2 partial pressure (PETCO2) has been suggested as a noninvasive index reflecting cardiac output under constant ventilation. The aim of this study was to examine whether PETCO2 does reflect cardiac output, even during exercise, in patients with acute myocardial infarction (AMI) undergoing exercise training early after onset. Method and Results Patients aged 47-73 years wer...

End-tidal CO2 monitoring during anesthesia.

Tidal volume, cardiac output and functional residual capacity determine end-tidal CO2 transient during standing up in humans.

In man assuming the upright position, end-tidal P(CO(2)) (P(ETCO(2))) decreases. With the rising interest in cerebral autoregulation during posture change, which is known to be affected by P(ETCO(2)), we sought to determine the factors leading to hypocapnia during standing up from the supine position. To study the contribution of an increase in tidal volume (V(T)) and breathing frequency, a dec...