[Pulmonary or circulatory causes of dyspnea - value of spiroergometry]

K H Rühle
Pneumologie 2006, 60 (12): 777-83
Patients often report of dyspnea during exertion which should be further analysed as a hint of heart or lung disease. When case history, chest X-ray, ECG, spirometry, and methacholine test do not explain the complaints, a cardiopulmonary exercise test is recommended. Parameters of spiroergometry can often elucidate cardiocirculatory or pulmonary causes. In cardiocirculatory triggered dyspnea the following pattern can be found: reduced maximal oxygen consumption and work rate (WR), an early plateau of oxygen consumption/WR, reduced increase of oxygen consumption/WR, reduced heart rate reserve < 15 beats/min, reduced oxygen pulse and an early plateau, increased breathing reserve, an increased minute ventilation/CO (2) production indicating increased dead space ventilation. In pulmonary triggered dyspnea the following pattern can be found: reduced maximal oxygen consumption, increased heart rate reserve, reduced breathing reserve. With the exercise tidal flow volume loop plotted within the maximal flow volume loop a more thorough interpretation is possible. In a case presentation, the decision-making process using the 9-panel display of Wasserman is demonstrated.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read

Save your favorite articles in one place with a free QxMD account.


Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"