1. Intraaortic Balloon Counterpulsation Improves Right Ventricular Failure Resulting From Pressure Overload 
William C Darrah, Michael D Sharpe, Gerard M Guiraudon, Andy Neal 
The Annals of Thoracic Surgery 
Volume 64, Issue 6, Pages (December 1997)
DOI: /S (97)

2. Fig. 1
Electrocardiogram tracing (lead II) at baseline (A), immediately after partial constriction of the pulmonary artery (B), and immediately after the institution of intraaortic balloon counterpulsation (C).
The Annals of Thoracic Surgery  , DOI: ( /S (97) )