1. Effects of minimal invasive coronary artery bypass on pulmonary function and postoperative pain 
Artur Lichtenberg, MD, Christian Hagl, MD, Wolfgang Harringer, MD, Uwe Klima, MD, Axel Haverich, MD 
The Annals of Thoracic Surgery 
Volume 70, Issue 2, Pages (August 2000)
DOI: /S (00)

2. Fig 1
Vital capacity and FEV1 preoperatively and for the first 5 postoperative days in the MIDCAB (group A) and CABG (group B) groups. Data are shown as the mean ± SD. (MIDCAB = minimally invasive direct coronary artery bypass; CABG = coronary artery bypass grafting; VC = vital capacity; FEV1 = forced expiratory volume in 1 second; POD = postoperative day.)
The Annals of Thoracic Surgery  , DOI: ( /S (00) )

3. Fig 2
Pain level for the first postoperative 5 days in group A (MIDCAB) and group B (CABG). Pain score: 0 = no pain whatsoever; 10 = the worst imaginable pain. Data are shown as the mean ± SD. (MIDCAB = minimally invasive direct artery bypass; CABG = coronary artery bypass grafting; POD = postoperative day.)
The Annals of Thoracic Surgery  , DOI: ( /S (00) )