[show abstract][hide abstract] ABSTRACT: Although positron emission tomography (PET) is routinely performed using vasodilator stress, exercise and dobutamine stress are available alternatives. Evidence suggests that vasodilator PET myocardial perfusion imaging (MPI) has prognostic value, but the prognostic value of treadmill exercise and dobutamine PET MPI is unknown.
To determine the potential prognostic value of nonvasodilator stress PET MPI.
Patients underwent treadmill exercise or dobutamine PET MPI. Images were assessed qualitatively and semiquantitatively. PET results were categorized as normal (summed stress score [SSS] of less than 4), abnormal (SSS of 4 or greater) or inconclusive (SSS of less than 4 and submaximal peak stress heart rate). Patient follow-up (cardiac death, nonfatal myocardial infarction [MI] and/or late revascularization) was performed.
Of the 124 patients (mean follow-up period of 2.3+/-1.6 years), 46 patients (37%) had a normal study, 15 patients (12%) had an inconclusive study and 63 (51%) had an abnormal PET. Patients with a normal PET had no deaths or nonfatal MI. One patient with a normal PET underwent late revascularization (annual event rate of 1.7%). Patients with an abnormal PET had 15 cardiac events (one cardiac death, four nonfatal MIs and 10 late revascularizations), with an annual event rate of 13.0% (P=0.002).
Although small, the present study suggests that defects seen on PET myocardial perfusion, resulting from stressors (treadmill exercise and dobutamine) that increase myocardial oxygen demand, may have prognostic value.
The Canadian journal of cardiology 08/2009; 25(7):e220-4. · 3.12 Impact Factor
[show abstract][hide abstract] ABSTRACT: Successful management of acute cardiac tamponade secondary to coronary artery perforation during percutaneous coronary intervention (PCI) includes sealing off the site of perforation and pericardiocentesis. We report two cases of acute cardiac tamponade during PCI associated with the administration of bivalirudin, in which attempts at percutaneous pericardiocentesis failed, due to the present of thrombus, rather blood, in the pericardium.
Catheterization and Cardiovascular Interventions 07/2009; 75(1):114-6. · 2.51 Impact Factor
[show abstract][hide abstract] ABSTRACT: 'Celiac crisis' is a rare presentation of celiac disease with manifestations that include severe diarrhea, and severe metabolic and electrolyte abnormalities. It is most frequently seen in children younger than two years of age and has been rarely described in adults. A case of a 50-year-old woman who presented with diarrhea, severe dehydration, hypokalemia and metabolic acidosis is described. Based on positive serology and small bowel biopsy, she was diagnosed with celiac disease. She also had histological evidence of lymphocytic colitis. Microscopic colitis has not previously been described in association with celiac crisis, but it may have contributed to the presentation of celiac crisis in the current case. The patient was on corticosteroids and azathioprine for autoimmune hepatitis at the time of her presentation. The current case demonstrates that modest immunosuppression does not prevent a celiac crisis, although previous reports have shown that patients may respond rapidly to high-dose corticosteroids.
Canadian journal of gastroenterology = Journal canadien de gastroenterologie 07/2008; 22(6):574-6. · 1.53 Impact Factor