Hemiplegic migraine episode triggered by regadenoson.

SPECT and PET myocardial perfusion imaging (MPI) are widely used to evaluate patients for coronary artery disease. Regadenoson (a selective A2A adenosine receptor agonist) is a commonly used vasodilator agent for stress MPI because of its safety profile and ease of use. Common adverse reactions such as headache, shortness of breath, flushing, and chest and abdominal discomfort are typically mild and can be effectively reversed using methylxanthines such as aminophylline and caffeine. Neurological adverse reactions such as seizure and stroke have rarely been reported with the use of regadenoson. The hemodynamic changes associated with regadenoson administration, such as an exaggerated hypotensive or hypertensive response, may be the cause for the reported cerebrovascular accidents. Activation of central nervous system A2A adenosine receptors is thought to be responsible for seizure episodes in patients with or without known histories of seizure. A2A adenosine receptors activation is also believed to play a role in headaches and migraine. This patient reported who has a history of hemiplegic migraine developed left side weakness and headache following the administration of regadenoson during a PET MPI study. Imaging work-up to rule out cerebrovascular accident was normal. After 1 hour from the onset of his symptoms, his weakness and headache significantly improved with complete resolution within 24 hours. We concluded that regadenoson triggered a hemiplegic migraine episode in this patient, which has not been previously reported in the literature. It may be prudent to avoid regadenoson and adenosine use in patients with a history of hemiplegic migraine.

Drug Safety in Episodic Migraine Management in Adults Part 1: Acute Treatments.

PURPOSE OF REVIEW: The aim of this review is to aid in choosing safe options when assessing potential risks of acute migraine treatments based on known mechanisms of action and anticipated safety concerns. RECENT FINDINGS: Part 1 highlights safety issues associated with commonly used medications to treat acute migraine attacks. Strategies to mitigate cardiovascular and gastrointestinal risks of nonsteroidal anti-inflammatory drugs, evaluation of cardiovascular risks of triptan and ergot alkaloids, and precautions with use of antiemetics and the novel drugs gepants and ditans are discussed to help practitioners in clinical decision-making. When available, we included recommendations from professional societies and data from pharmacovigilance systems. While guidelines on efficacy are available, one must also consider the possible risks and adverse effects of a drug when creating treatment plans.

Drug Safety in Episodic Migraine Management in Adults. Part 2: Preventive Treatments.

PURPOSE OF REVIEW: The aim of this review is to aid in decision-making when choosing safe and effective options for preventive migraine medications. RECENT FINDINGS: In Part 2, we have compiled clinically relevant safety considerations for commonly used migraine prophylactic treatments. Preventive treatment of episodic migraine includes nonspecific and migraine-specific drugs. While medications from several pharmacological classes-such as anticonvulsants, beta-blockers, and antidepressants-have an established efficacy in migraine prevention, they are associated with a number of side effects. The safety of migraine-specific treatments such as anti-CGRP monoclonal antibodies and gepants are also discussed. This review highlights safety concerns of commonly used migraine prophylactic agents and offers suggestions on how to mitigate those risks.

Primary Empty Sella.

Primary empty sella (PES) syndrome is a misnomer as it is not a syndrome but a radiological finding with possible endocrine abnormalities. No specific headache type has been shown to be caused by PES. Endocrine screening may be considered for asymptomatic persons with PES.

Intravenous Thrombolysis for Acute Ischemic Stroke in Patients with Thrombocytopenia.

OBJECTIVE: To determine the safety of intravenous (IV) recombinant tissue plasminogen activator (rtPA) in patients with acute ischemic stroke (AIS) who had a platelet count <100,000 /mm3. METHODS: We reviewed the charts of all patients who received IV rtPA for AIS during a 9.6-year period at our stroke center. Those with platelets <100,000/mm3 were identified. Head computed tomography scans performed in 24-36 hours postthrombolysis were reviewed to evaluate the rate of symptomatic intracranial hemorrhage (sICH). RESULTS: A total of 835 patients received IV rtPA for AIS during this period. A total of 5 patients were identified to have a platelet count <100,000/mm3. One of them (20%) developed sICH post-IV tPA administration .The mean platelet count of those 5 patients was 63,000 ± 19,000/mm3. To the best of our knowledge, only 21 thrombocytopenic patients have been reported to receive IV rtPA for AIS in the medical literature. Combining our 5 cases with 21 patients previously reported, we have 26 AIS patients who had a platelet count <100,000/mm3 and received IV rtPA, with 2 of them developing sICH (7.7 %). Comparing the rate of sICH among this group with the patients with normal platelet count in our cohort, there was no statistically significant difference (7.7% versus 6.04%, P value = .73). CONCLUSION: IV rtPA for AIS might be safe in patients with platelet count <100,000/mm3 and it is reasonable not to delay IV rtPA administration while waiting for the platelet count result, unless there is strong suspicion for abnormal platelet count.

Safety and efficacy of antiplatelet use before intravenous thrombolysis for acute Ischemic stroke.

AIM: To study the effects of pretreatment with Antiplatelet (AP) before IV thrombolysis (IVT) on the rate of symptomatic intracranial hemorrhage (sICH) and functional outcome in patients with Acute Ischemic stroke (AIS). METHOD: In this retrospective study, the medical records and cerebrovascular images of all the patients who received IVT for AIS in our center in a 9.6-year period were reviewed. Patients who took at least one dose of any APs in the last 24 h prior to IVT were identified. They were categorized according to the type of AP, single versus dual AP therapy (DAPT), and dose of AP. Rate of sICH and functional outcome at discharge were compared between the AP users and non-users. RESULTS: A total of 834 patients received IVT for AIS in our center during a 9.6- year period. Multivariate models were adjusted for age, NIHSS on admission, history of atrial fibrillation, history of hypertension, INR on admission, history of stroke and diabetes mellitus. In multivariate regression analyses and after adjusting for the variables mentioned above, the use of any AP was not associated with an increased rate of sICH (OR = 1.28 [0.70-2.34], p = 0.425). Furthermore, the use of DAPT did not significantly increase the rate of sICH in multivariate regression analyses. (OR = 0.663 [0.15-2.84], p = 0.580). The patients on any AP had a lower chance of having good functional outcome in univariate analysis (OR = 0.735 [0.552-0.979], p = 0.035). However, when adjusted for age, baseline NIHSS, history of diabetes, hypertension and prior stroke, AP use was not associated with a decreased chance of having a good functional outcome at discharge. (OR = 0.967 [0.690-1.357], p = 0.848). In addition, no significant difference was noted in the rate of good functional outcome between patients on DAPT and no AP users in multivariate regression analyses. (OR = 1.174 [0.612-2.253], p = 0.629). CONCLUSION: Our study did not show any significant association between the risk of sICH and good functional outcome after IVT for AIS patients on AP therapy (dual or single) in comparison with AP naïve patients.

Update in the Evaluation and Management of Perioperative Stroke.

PURPOSE OF REVIEW: This review will review the current knowledge and gaps in the literature on the relationship between surgery and ischemic stroke. FINDINGS: Surgery and ischemic stroke are interrelated phenomena as surgery is an independent risk factor for stroke and perioperative stroke increases morbidity and mortality leading to poor outcomes after surgery. This relationship and the risk of adverse outcome apply not only the clinically apparent stroke in the perioperative period but also clinically silent brain infarction detected only on radiological studies. The risk of perioperative stroke depends on several factors including (i) patient-related factors (age, history of prior stroke, and other comorbidities), (ii) procedure-related factors (type of surgery/procedure, use of cardiopulmonary bypass, antiplatelet/antithrombotic interruption, and metabolic derangement), and (iii) perioperative atrial fibrillation. With observation and retrospective data, the literature is limited to prevention and management of perioperative stroke.

Is acute reperfusion therapy safe in acute ischemic stroke patients who harbor unruptured intracranial aneurysm?

BACKGROUND: Intracranial aneurysms are currently considered as contraindication for intravenous thrombolysis in acute ischemic stroke, very likely due to a possible increase in the risk of bleeding from aneurysm rupture; however, there is limited data available on whether intravenous thrombolysis is safe for acute ischemic stroke patients with pre-existing intracranial aneurysms. AIMS AND/OR HYPOTHESIS: To find out the safety of intravenous thrombolysis in acute ischemic stroke patients who harbor unruptured intracranial aneurysms. METHODS: We retrospectively reviewed the medical records and cerebrovascular images of all the patients treated with intravenous thrombolysis for acute ischemic stroke in our center from the beginning of 2006 till the end of April 2014. Those with unruptured intracranial aneurysm present on cerebrovascular images prior to acute reperfusion therapy were identified. Post-thrombolysis brain imaging was reviewed to evaluate for any intraparenchymal or subarachnoid hemorrhage related or unrelated to the aneurysm. RESULTS: A total of 637 patients received intravenous thrombolysis for acute ischemic stroke in our center during an 8·3-year period. Thirty-three (5·2%) were found to have at least one intracranial aneurysms. Twenty-three (70%) of those received only intravenous thrombolysis, and 10 patients received combination of intravenous and intra-arterial thrombolysis. The size of the largest aneurysm was 10 mm in maximum diameter (range: 2-10 mm). The mean size of aneurysms was 4·8 mm. No symptomatic intracranial hemorrhage occurred among the 23 patients receiving only intravenous thrombolysis. Out of those who received a combination of intravenous and intra-arterial thrombolysis, one developed symptomatic intracranial hemorrhage in the location of acute infarct, distant to the aneurysm location. CONCLUSION: Our findings suggest that neither intravenous thrombolysis nor combination of intravenous and intra-arterial thrombolysis increases the risk of aneurysmal hemorrhage in acute ischemic stroke patients who harbor unruptured intracranial aneurysms less than 10 mm in diameter. Their listing in exclusion criteria for intravenous thrombolysis should be reconsidered to assure appropriate use of acute reperfusion therapy in this group of patients.