Differentiating malignant hypertension-induced thrombotic microangiopathy from thrombotic thrombocytopenic purpura
| Autor: | Sumit Dahal, Nabin Khanal, Smrity Upadhyay, Vijaya Raj Bhatt, Philip J. Bierman |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Therapeutic Advances in Hematology. 6:97-102 |
| ISSN: | 2040-6215 2040-6207 |
| DOI: | 10.1177/2040620715571076 |
| Popis: | Objectives: Malignant hypertension can cause thrombotic microangiopathy (TMA) and the overall presentation may mimic thrombotic thrombocytopenic purpura (TTP). This presents a dilemma of whether or not to initiate plasma exchange. The objective of the study was to determine the clinical and laboratory manifestations of malignant hypertension-induced TMA, and its outcomes. Methods: Using several search terms, we reviewed English language articles on malignant hypertension-induced TMA, indexed in MEDLINE by 31 December 2013. We also report a new case. All these cases were analyzed using descriptive statistics. Results: A total of 19 patients, with 10 males, had a median age of 38 years at diagnosis; 58% had a history of hypertension. Mean arterial pressure at presentation was 159 mmHg (range 123–190 mmHg). All had prominent renal dysfunction (mean creatinine of 5.2 mg/dl, range 1.7–13 mg/dl) but relatively modest thrombocytopenia (mean platelet count of 60 × 103/µl, range 12–131 × 103/µl). Reported cases ( n = 9) mostly had preserved ADAMTS-13 activity (mean 64%, range 18–96%). Following blood pressure control, the majority had improvement in presenting symptoms (100%) and platelet counts (84%); however, only 58% had significant improvement in creatinine. More than half (53%) needed hemodialysis. One patient died of cardiac arrest during pacemaker insertion. Conclusion: Prior history of hypertension, high mean arterial pressure, significant renal impairment but relatively modest thrombocytopenia and lack of severe ADAMTS-13 deficiency (activity |
| Databáze: | OpenAIRE |
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