Prognostic value of cardiac troponin I release kinetics in unstable angina.

BACKGROUND: Cardiac Troponins (cTn) are useful in unstable angina (UA). Moreover the different elevation patterns that can be observed in this condition seem to have different prognostic implications. AIM: To study cTn kinetics and cTn nadir in patients with UA, defined as angina at rest within the last 24 hours before admission accompanied by ischemic ECG changes and no myocardial infarction (MI) enzymatic criteria. POPULATION AND METHODS: Samples were collected from 156 patients for cardiac enzymes and cTnI at admission and at 6, 12, 18 and 24 hours. The chemilluminescence method (Access/Sanofi Pasteur) was used for cTnI. The primary end-point at 30 days was the combined occurrence of death, MI and recurrent ischemia. RESULTS: All determinations were below 0.10 ng/ml (group N) in 114 patients and the other 42 pts (group P) had at least one value equal to or above 0.10 ng/ml. The primary endpoint was observed in 24.6% of group N pts compared with 45.2% of group P pts (p = 0.02). Three different patterns of cTnI kinetics were observed. This enabled the identification of a subgroup--group N pts with increasing cTnI values within the first 12 hours and a total differential value > or = 0.03 ng/ml--with an increased risk (50.0% versus 21.4%--p = 0.02--Kaplan-Meier test). CONCLUSION: Besides the prognostic value conferred by cTnI elevation, cTnI kinetics analysis established another sub-group of patients with an adverse prognosis at 30 days follow-up, despite having a negative cTnI.

Renal toxicity mediated by continuous infusion of recombinant interleukin-2.

Interleukin-2 (IL-2), a potent lymphokine with antitumoral activity, was used in continuous intravenous infusion for 5 days (18,000,000 IU/m2/day) in 9 treatment cycles in 5 patients with metastatic colorectal carcinoma. During the infusion, patients received aggressive fluid replacement titrated by invasive hemodynamic monitoring, aiming at a stable central volemia. Body weight went up an average of 4.5 kg in 5 days, mean arterial blood pressure dropped slightly from day 1 to day 5 (105.4 +/- 11.6 to 86.1 +/- 12.5 mm Hg, p < 0.05), systemic vascular resistance decreased from 1304.7 +/- 242.1 to 871.7 +/- 237.2 dyn/s/cm-5 (p < 0.05), with stable pulmonary capillary wedge pressure, cardiac output and central venous pressure. The urinary output significantly dropped from 1.9 +/- 1.2 to 0.2 +/- 0.1 ml/min (p < 0.05) with very significant rises in serum creatinine from 76.0 +/- 28.3 to 242.2 +/- 144.9 mumol/l (0.86 +/- 0.32 to 2.47 +/- 1.64 mg/dl) and N-acetyl-beta-D-glucosaminidase urinary activity from 4.97 +/- 5.0 to 23.0 +/- 12.1 U/l, and significant decrement of creatinine clearance (1.86 +/- 0.65 to 0.29 +/- 0.27 ml/s or 111.5 +/- 38.9 to 17.1 +/- 16.6 ml/min) and urinary sodium (113.8 +/- 78.3 to 9.0 +/- 6.7 mmol/l). Urine sediment evolved from normal at day 1 to 9.0 +/- 3.7 epithelial cells/mm3 and 6.9 +/- 3.6 brown casts/mm3 (p = 0.001). We concluded that cancer treatment with IL-2 in continuous infusion, even with stable hemodynamics, induces an acute renal failure in most patients treated.

Thiemann's disease.

We report a case of early stage Thiemann's disease in a 12-yr-old girl. This may be the first report of this disease from Portugal. The clinical and radiological aspects of this condition are discussed. Based on a review of the literature, preliminary diagnostic criteria are proposed.