1Wasserman K,Hansen J,Sue D,et al.Principles of exercise testing and interpretation[M].5th Ed.Philadelphia:Lippincott Williams & Wilkins,2011:129-153.
2Porszasz J,Casaburi R,Somfay A,et al.A treadmill ramp protocol using simultaneous changes in speed and grade[J].Med Sci Sports Exerc,2003,35:1596-1603.
3Wasserman K,Sun XG,Hansen JE.Effect of biventricular pacing on the exercise pathophysiology of heart failure[J].Chest,2007,132:250-261.
4Sun XG,Hansen JE,Beshai JF,et al.Oscillatory breathing and exercise gas exchange abnormalities prognosticate early mortality and morbidity in heart failure[J].J Am Coll Cardiol,2010,55:1814-1823.
5Sun XG,Hansen JE,Stringer WW.Oxygen uptake efficiency plateau best predicts early death in heart failure[J].Chest,2012,141:1284-1294.
6Beaver WL,Wasserman K,Whipp BJ.On-line computer analysis and breath-by-breath graphical display of exercise function tests[J].J Appl Physiol,1973,34:128-132.
7Huszczuk A,Whipp BJ,Wasserman K.A respiratory gas exchange simulator for routine calibration in metabolic studies[J].Eur Respir J,1990,3:465-468.
8Barst R J,Langleben D,Frost A,et al.Sitaxsentan therapy for pulmonary arterial hypertension[J].Am J Respir Crit Care Med,2004,169:441-447.
9Oudiz RJ,Barst RJ,Hansen JE,et al.Cardiopulmonary exercise testing and six-minute walk correlations in pulmonary arterial hypertension[J].Am J Cardiol,2006,97:123-126.
10Doshi RN,Daoud EG,Fellows C,et al.Left ventricular-based cardiac stimulation post AV nodal ablation evaluation (the PAVE study)[J].J Cardiovasc Electrophysiol,2005,16:1160-1165.