1. Muscle sympathetic nerve activity in patients with Chagas' disease
Carlos E. Negrão, Amilton C. Santos, Maria U. Rondon, Fabio G. Franco, Barbara Ianni, Carlos E. Rochitte, Ana M.F.W. Braga, Múcio T. Oliveira, Charles Mady, Antonio C.P. Barretto, Holly R. Middlekauff 
International Journal of Cardiology 
Volume 137, Issue 3, Pages (November 2009)
DOI: /j.ijcard
Copyright © 2008 Elsevier Ireland Ltd Terms and Conditions

2. Fig. 1
Sympathetic neurograms. Note that muscle sympathetic nerve activity is markedly elevated in heart failure patients, but not in Chagasic without heart failure patient.
International Journal of Cardiology  , DOI: ( /j.ijcard )
Copyright © 2008 Elsevier Ireland Ltd Terms and Conditions

3. Fig. 2
Individual levels of muscle sympathetic nerve activity burst frequency (A) and bursts per 100 heart beats (B) in normal controls (NC), Chagas' disease patients and heart failure (HF) patients. * = vs. normal controls and Chagas' disease patients (P<0.05).
International Journal of Cardiology  , DOI: ( /j.ijcard )
Copyright © 2008 Elsevier Ireland Ltd Terms and Conditions

4. Fig. 3
Muscle sympathetic nerve activity burst frequency (A) and bursts per 100 heart beats (B) during exercise in normal controls (NC), Chagas' disease patients and heart failure (HF) patients. * = vs. Chagas' disease patients without HF and NC (P<0.05). + = All groups vs. basal (P<0.05).
International Journal of Cardiology  , DOI: ( /j.ijcard )
Copyright © 2008 Elsevier Ireland Ltd Terms and Conditions