| Acute cardiorespiratory failure, chronic obstructive pulmonary disease | 
| Aspiration pneumonia secondary to dysphagia from cerebrovascular accident | 
| Congestive heart failure, renal failure, reactive airway disease | 
| Kidney failure due to hypertensive nephrosclerosis, cerebrovascular disease | 
| Malignancy-related (n=4): metastatic squamous cell carcinoma of the lung, metastatic endometrial carcinoma with small bowel obstruction, mesothelioma of pleura and pericardium, metastatic esophageal adenocarcinoma | 
| Multifactorial kidney failure | 
| Necrotizing pancreatitis and purulent peritonitis | 
| Respiratory failure, congestive heart failure, chronic hypersensitivity pneumonitis | 
| Respiratory infection (viral) in setting of aortic stenosis and congestive heart failure | 
| Unknown (n=3) |