Table 2 Preexisting cardiopulmonary complications of 40 patients

Heart disease

13 (33%)^a

 Ischemic heart disease

6

 Chronic heart failure

3

 Aortic stenosis

3

 Atrial fibrillation

3

 Mitral regurgitation

2

 Pulmonary hypertension

2

 Dilated cardiomyopathy

1

 Sick sinus syndrome

1

 Tricuspid regurgitation

1

Respiratory disease

5 (12.5%)

 Bronchial asthma

2

 Pulmonary aspergillosis

1

 Bronchiectasis

1

 Pneumoconiosis

1