RESUMO
Thrombotic thrombocytopenic purpura (TTP) is a potentially life-threatening thrombotic microangiopathy (TMA) that needs prompt identification and treatment. Disseminated malignancy-related TMA can potentially be misdiagnosed as TTP, and patients may be inappropriately subjected to therapeutic plasma exchange (TPE) with serious implications. Likewise, the presence of a concurrent cancer diagnosis in a patient with microangiopathic hemolytic anemia and thrombocytopenia may lead to suspicion of disseminated malignancy as the cause, delaying the TPE with serious outcomes. Testing for ADAMTS13 activity is diagnostic of TTP, but the results may take time. This poses a diagnostic and therapeutic dilemma that includes weighing the benefits of TPE for treating TTP and cancer treatment. We describe a rare case of immune-mediated TTP in a patient concurrently diagnosed with metastatic renal cell cancer. To our knowledge, this is the first case of TTP reported in patients with metastatic renal cell carcinoma (RCC) in a non-treatment-naive patient.
RESUMO
There are limited data available on outcomes and pathophysiology behind ST-segment elevation myocardial infarction (STEMI) in populations without standard modifiable risk factors (SMuRFs). The authors carried out this meta-analysis to understand the differences in treatment and outcomes of STEMI patients with and without SMuRFs. Methods: A systematic database search was performed for relevant studies. Studies reporting desired outcomes among STEMI patients with and without SMuRFs were selected based on predefined criteria in the study protocol (PROSPERO: CRD42022341389). Two reviewers independently screened titles and abstracts using Covidence. Full texts of the selected studies were independently reviewed to confirm eligibility. Data were extracted from all eligible studies via a full-text review of the primary article for qualitative and quantitative analysis. In-hospital mortality following the first episode of STEMI was the primary outcome, with major adverse cardiovascular events (MACE), repeat myocardial infarction (MI), cardiogenic shock, heart failure, and stroke as secondary outcomes of interest. Odds ratio (OR) with a 95% CI was used to estimate the effect. Results: A total of 2135 studies were identified from database search, six studies with 521 150 patients with the first STEMI episode were included in the analysis. The authors found higher in-hospital mortality (OR: 1.43; CI: 1.40-1.47) and cardiogenic shock (OR: 1.59; 95% CI: 1.55-1.63) in the SMuRF-less group with no differences in MACE, recurrent MI, major bleeding, heart failure, and stroke. There were lower prescriptions of statin (OR: 0.62; CI: 0.42-0.91) and Angiotensin converting enzyme inhibitor /Angiotensin II receptor blocker (OR: 0.49; CI: 0.28-0.87) at discharge in SMuRF-less patients. There was no difference in procedures like coronary artery bypass graft, percutaneous coronary intervention, and thrombolysis. Conclusion: In the SMuRF-less STEMI patients, higher in-hospital mortality and treatment discrepancies were noted at discharge.
RESUMO
Anomalous origin of the left main coronary trunk from the right coronary sinus is a rare condition and is associated with a significantly increased risk of cardiac events, including sudden cardiac death, and it may pose difficulties in their management using revascularization strategies. We present a case of a 68-year-old man with worsening chest pain. Initial evaluation revealed ST elevation of the inferior wall leads and elevated troponins. He was diagnosed with ST-elevation myocardial infarction (STEMI) and sent for emergency cardiac catheterization. Coronary angiography showed 50% stenosis of the mid-right coronary artery (RCA) that extended as a total occlusion to the distal RCA and an unexpected anomalous origin of the left main coronary artery (LMCA). Our patient's LMCA originated from the right cusp sharing a single ostium with the RCA. Multiple attempts of revascularization with percutaneous coronary intervention (PCI), using multiple wires, catheters, and different-sized balloons, were unsuccessful due to complex anatomy. Our patient was managed with medical therapy and discharged home with close cardiology follow-up.
