scholarly journals Effect of cardiac training therapy on minute ventilation/carbon dioxide production slope and exercise parameters in patients with severe chronic heart failure in short-time rehabilitation

2017 ◽  
Vol 6 (4) ◽  
pp. 20
Author(s):  
ErikC Skobel ◽  
Michael Dreher ◽  
Christian Knackstedt
Keyword(s):  
Heart Failure ◽  
Carbon Dioxide ◽  
Chronic Heart Failure ◽  
Minute Ventilation ◽  
Carbon Dioxide Production ◽  
Severe Chronic Heart Failure ◽  
Short Time ◽  
Training Therapy

scholarly journals Abnormalities of the Ventilatory Equivalent for Carbon Dioxide in Patients with Chronic Heart Failure

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Lee Ingle ◽  
Rebecca Sloan ◽  
Sean Carroll ◽  
Kevin Goode ◽  
John G. Cleland ◽  
...  
Keyword(s):  
Heart Failure ◽  
Carbon Dioxide ◽  
Chronic Heart Failure ◽  
Oxygen Uptake ◽  
Minute Ventilation ◽  
Carbon Dioxide Production ◽  
Peak Oxygen Uptake ◽  
Healthy Controls ◽  
Ventilatory Equivalent ◽  
All Cause Mortality

Introduction. The relation between minute ventilation (VE) and carbon dioxide production (VCO2) can be characterised by the instantaneous ratio of ventilation to carbon dioxide production, the ventilatory equivalent for CO2(VEqCO2). We hypothesised that the time taken to achieve the lowest VEqCO2(time to VEqCO2 nadir) may be a prognostic marker in patients with chronic heart failure (CHF).Methods. Patients and healthy controls underwent a symptom-limited, cardiopulmonary exercise test (CPET) on a treadmill to volitional exhaustion.Results. 423 patients with CHF (mean age years; 80% males) and 78 healthy controls (62% males; age years) were recruited. Time to VEqCO2 nadir was shorter in patients than controls ( s versus  s; ). Univariable predictors of all-cause mortality included peak oxygen uptake (), VEqCO2nadir (), and time to VEqCO2nadir (). In an adjusted Cox multivariable proportional hazards model, peak oxygen uptake () and VEqCO2nadir () were the most significant independent predictors of all-cause mortality.Conclusion. The time to VEqCO2nadir was shorter in patients with CHF than in normal subjects and was a predictor of subsequent mortality.

scholarly journals Minute ventilation/carbon dioxide production in chronic heart failure

2021 ◽  
Vol 30 (159) ◽  
pp. 200141
Author(s):  
Piergiuseppe Agostoni ◽  
Susanna Sciomer ◽  
Pietro Palermo ◽  
Mauro Contini ◽  
Beatrice Pezzuto ◽  
...  
Keyword(s):  
Heart Failure ◽  
Carbon Dioxide ◽  
Chronic Heart Failure ◽  
Dead Space ◽  
Minute Ventilation ◽  
Carbon Dioxide Production ◽  
Absolute Number ◽  
Prognostic Scores ◽  
And Gender ◽  
End Tidal

In chronic heart failure, minute ventilation (V′E) for a given carbon dioxide production (V′CO2) might be abnormally high during exercise due to increased dead space ventilation, lung stiffness, chemo- and metaboreflex sensitivity, early metabolic acidosis and abnormal pulmonary haemodynamics. The V′Eversus V′CO2 relationship, analysed either as ratio or as slope, enables us to evaluate the causes and entity of the V′E/perfusion mismatch. Moreover, the V′E axis intercept, i.e. when V′CO2 is extrapolated to 0, embeds information on exercise-induced dead space changes, while the analysis of end-tidal and arterial CO2 pressures provides knowledge about reflex activities. The V′Eversus V′CO2 relationship has a relevant prognostic power either alone or, better, when included within prognostic scores. The V′Eversus V′CO2 slope is reported as an absolute number with a recognised cut-off prognostic value of 35, except for specific diseases such as hypertrophic cardiomyopathy and idiopathic cardiomyopathy, where a lower cut-off has been suggested. However, nowadays, it is more appropriate to report V′Eversus V′CO2 slope as percentage of the predicted value, due to age and gender interferences. Relevant attention is needed in V′Eversus V′CO2 analysis in the presence of heart failure comorbidities. Finally, V′Eversus V′CO2 abnormalities are relevant targets for treatment in heart failure.

Prognostic Comparison of the Minute Ventilation/Carbon Dioxide Production Ratio and Slope in Patients with Heart Failure

Heart Drug ◽  
2004 ◽  
Vol 4 (3) ◽  
pp. 133-139 ◽  
Author(s):  
Ross Arena ◽  
Jonathan Myers ◽  
Syed Salman Aslam ◽  
Elsa B. Varughese ◽  
Mary Ann Peberdy
Keyword(s):  
Heart Failure ◽  
Carbon Dioxide ◽  
Minute Ventilation ◽  
Carbon Dioxide Production ◽  
Production Ratio ◽  
Patients With Heart Failure

scholarly journals Relation between ventilation and carbon dioxide production in patients with chronic heart failure

1992 ◽  
Vol 20 (6) ◽  
pp. 1326-1332 ◽  
Author(s):  
Andrew Lawrence Clark ◽  
Philip Alexander Poole-Wilson ◽  
Andrew Justin Stewart Coats
Keyword(s):  
Heart Failure ◽  
Carbon Dioxide ◽  
Chronic Heart Failure ◽  
Carbon Dioxide Production

scholarly journals Association between ventilatory efficiency, oxygen uptake, and Glittre-ADL test results in patients with chronic heart failure: a preliminary study

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Hebert Olímpio Júnior ◽  
Agnaldo José Lopes ◽  
Fernando Silva Guimarães ◽  
Sergio Luiz Soares Marcos da Cunha Chermont ◽  
Sara Lúcia Silveira de Menezes
Keyword(s):  
Heart Failure ◽  
New York ◽  
Chronic Heart Failure ◽  
Functional Capacity ◽  
Treatment Plan ◽  
Minute Ventilation ◽  
Heart Association ◽  
Gas Analysis ◽  
Ventilatory Efficiency ◽  
Scale Scores

Abstract Objective The Glittre-ADL test (GA-T) is a functional capacity test that stands out for encompassing multiple tasks similar to activities of daily living. As ventilatory efficiency is one of the variables valued in the prognosis of chronic heart failure (CHF), this study aimed to evaluate associations between functional capacity and ventilatory variables in patients with CHF during the GA-T. Results Eight patients with CHF and New York Heart Association (NYHA) functional classification II–III underwent the GA-T coupled with metabolic gas analysis to obtain data by means of telemetry. The median total GA-T time was 00:04:39 (00:03:29–00:05:53). Borg dyspnoea scale scores before and after the GA-T were 2 (0–9) and 3 (1–10), respectively (P = 0.011). The relationship between the regression slope relating minute ventilation to carbon dioxide output (VE/VCO2 slope) was correlated with the total GA-T time (rs = 0.714, P = 0.047) and Borg dyspnoea score (rs = 0.761, P = 0.028). The other ventilatory variables showed no significant correlations. Our results suggest that the total GA-T time can be applied to estimate the ventilatory efficiency of patients with CHF. Future studies may use the GA-T in conjunction with other functional capacity tests to guide the treatment plan and evaluate the prognosis.

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