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Eur J Cardiothorac Surg 2004;26:508-514
© 2004 Elsevier Science NL
a Second Department of Thoracic Surgery, Athens Chest Diseases Hospital ‘Sotiria’, 152 Messogion Avenue, 11527 Athens, Greece
b Department of Cardiology, Athens Chest Diseases Hospital ‘Sotiria’, 152 Messogion Avenue, 11527 Athens, Greece
Received 22 February 2004; received in revised form 15 May 2004; accepted 24 May 2004.
* Corresponding author. Address: Athens Chest Diseases Hospital, 35 Ioustinianou Street, 41223 Larissa, Greece. Tel.: +30-241-287-466/944-910-343; fax: +30-241-611-097
e-mail: foroulis{at}internet.gr
Objective: Changes in the pulmonary artery systolic pressure (PASP) and the dimensions of the right ventricle (RV) of the heart, six months after pneumonectomy, were evaluated in order to detect the influence of pneumonectomy on right heart function. Methods: 35 patients undergoing pneumonectomy (Group A) and 17 patients undergoing lobectomy or bilobectomy (Group B) were evaluated prospectively with spirometry, arterial blood gases determination and Doppler echocardiography at rest, preoperatively and six months postoperatively. Patients of both groups had normal preoperative PASP, RV dimensions and left ventricular ejection fraction. PASP was calculated using the equation: PASP=4x(maximal velocity of the tricuspid regurgitant jet)2+10 mmHg. FEV1, FVC, partial pressures of oxygen (pO2) and carbon dioxide in the arterial blood were considered as the main determinants of postoperative lung function. Results: PASP increased significantly six months postoperatively in both groups (P<0.05). Mean PASP in Group A (40.51±12.52 mmHg) was significantly higher (P=0.012) than in Group B (32.88±5.25 mmHg). Mean PASP after right pneumonectomy (48.33±10.61 mmHg) was significantly higher (P=0.002) than after left pneumonectomy (35.26±10.83 mmHg). The incidence of RV dilatation was higher in Group A (60%) than in Group B (23.52%). RV dilatation was related with elevated PASP values in both groups (P<0.001 and P=0.034, respectively). Increased age (P<0.001), significant percent FVC reduction from preoperative values (P=0.012) and low pO2 values (P=0.001) were detected as strong predisposing factors for postpneumonectomy PASP elevation. Conclusions: Pneumonectomy is related with postoperative elevation of PASP and RV dilatation, especially right pneumonectomy. Significant percent FVC reduction, increased age and low pO2 values are the main responsible factors for elevation of the 6-month postoperative PASP values.
Key Words: Pneumonectomy • Late effects of pneumonectomy • Right ventricular systolic pressure • Pulmonary artery systolic pressure • Doppler echocardiography • Tricuspid regurgitation
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