Severe Shivering as an Adverse Effect of Regadenoson Myocardial Perfusion Imaging.

Regadenoson myocardial perfusion imaging (MPI) is a widely used screening study for patients with an intermediate pretest probability of coronary artery disease (CAD). Via selective agonism of the adenosine A2A receptor, regadenoson can induce coronary steal, revealing stenotic vessel territory through transient ischemia. Common side effects of this medication include chest pain, shortness of breath, nausea, vomiting, atrioventricular block, seizure, and allergic reactions. Here we present a case of severe shivering and chest tightness after the administration of regadenoson, along with a physiologic explanation and treatment.

Brief Review on COVID-19: The 2020 Pandemic Caused by SARS-CoV-2.

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the virus responsible for the coronavirus disease of 2019 (COVID-19). First identified in Wuhan (Hubei, China) in December of 2019, it has since been declared a pandemic by the World Health Organization in March of 2020. In this study, we will provide a brief review of viral origin, identification, symptoms, transmission, diagnosis, and potential treatment strategies for the newly identified SARS-CoV-2 strain.

Erosive Twiddler's Syndrome: A Severe Case with Externalization of the Pacemaker.

Implantable pacemakers have been the mainstay of therapy for patients with severely decreased left ventricular ejection fractions and recurrent arrhythmias, among other cardiac pathology. Twiddler's syndrome (TS) is an uncommon but potentially life-threatening complication of pacemaker therapy, defined as pacemaker malfunction in the setting of device lead dislodgment due to physical manipulation. Traditionally, there are three distinct TS variants (reeling, ratchet and coiling). This case offers evidence of a unique and new variant of TS, severe recurrent erosive subtype with pacemaker externalization.

Intraperitoneal and Extraperitoneal Colonic Perforation Following Diagnostic and Therapeutic Colonoscopy with Crohn's-related Stricture Dilation.

Colonic perforation is an uncommon but known and feared complication of colonoscopy, which carries a high mortality rate. We present an uncommon case of extensive intra- and extraperitoneal air following colonic perforation in a patient undergoing inpatient colonoscopy for evaluation of unintentional weight loss and constipation. During colonoscopy, a splenic flexure stricture was identified and dilated. Postprocedural hemodynamic instability prompted further imaging which revealed pneumoperitoneum, bilateral pneumothorax, pneumomediastinum, pneumopericardium, and severe subcutaneous emphysema. Emergent exploratory laparotomy found perforation of the proximal transverse colon which required resection and transverse colostomy placement. The patient also underwent bilateral chest tube placement and was treated with antibiotics for peritonitis. The patient was eventually diagnosed with Crohn's disease and discharged to an extended care facility with outpatient follow-up. Extraperitoneal colonic perforations are fairly rare, and to our knowledge, we present the most severe case that has been published in recent years.

Partial Fanconi Syndrome Induced by Ifosfamide.

Several commonly used chemotherapeutic agents, antibiotics, antivirals, and antiepileptic medications can cause partial or full Fanconi syndrome, disorders which can generally be described as transport defects in the proximal renal tubule, associated with non-anion gap metabolic acidosis. Fanconi syndrome is underreported and therefore often missed in the clinical setting. Herein, we present a case report that details the course of a 64-year-old female with a history of stage IV undifferentiated pleomorphic sarcoma who after her sixth chemotherapeutic cycle (adriamycin, ifosfamide, and mesna) developed severe hypokalemia, hypophosphatemia, and proteinuria without glycosuria, eventually diagnosed with partial Fanconi syndrome. The aim of this report is to highlight the importance of routine serum and urine monitoring in patients undergoing therapy with potentially nephrotoxic agents to avoid potentially fatal renal nephrotoxicity, including partial and full Fanconi syndrome.