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NASPAF-ICH: Multicentre antithrombotic therapy trial feasible for ICH survivors with AF

Jairia Dela Cruz
11 Mar 2020

A multicenter trial to investigate whether antithrombotic therapy can be initiated in atrial fibrillation (AF) patients who have survived an intracerebral haemorrhage (ICH) can be done, based on the results of the phase II feasibility trial NASPAF-ICH* presented at the 2020 International Stroke Conference (ISC).

The trial “provides the first randomized, albeit limited, data on clinical outcomes according to differing antithrombotic regimens in this vulnerable population,” said lead investigator Dr Ashkan Shoamanesh from the McMaster University in Hamilton, Ontario, Canada.

NASPAF-ICH recruited a total of 30 patients (mean age, 77 years; 43 percent female) with AF and previous ICH (≥2 weeks prior). These patients were randomly assigned to receive standard dosing nonvitamin K oral anticoagulants (NOACs; n=21; 76 percent received apixaban and 24 percent received dabigatran) or 81-mg aspirin (n=9) daily. None of them had ≥2 prior symptomatic lobar ICH, contraindications to aspirin/NOACs, and/or glomerular filtration rate of <30 mL/min/1.73/m2.

Recruitment rate, the primary feasibility outcome, was 3.1 per site per year at nine sites across Canada. Baseline median CHADSof the population was 2, HAS-BLED was 3, and MoCA was 25. Qualifying ICH was deep in most patients (60 percent), lobar in 30 percent and involved both regions in 10 percent. Intracerebral bleed occurred a median of 127 days prior to randomization, with 60 percent of cases occurring while on anticoagulation. [ISC 2020, abstract LB 13]

All patients completed follow-up, with a median duration of 13.5 months. Four patients (13.3 percent) discontinued treatment temporarily (one patient in the aspirin group and three in the NOAC group), and two (6.7 percent) withdrew it permanently (both in the aspirin group). Mean achieved blood pressure was 127/75 mm Hg.

The primary efficacy outcome of the composite of ischaemic stroke and recurrent ICH was recorded in one aspirin-treated patient (3 percent). The rate of all-cause mortality was 10 percent (two patients on aspirin and one on NOAC, respectively). No cases of recurrent ICH or fatal stroke were documented.

In terms of safety, major bleeding occurred in one aspirin-treated patient. Hospitalization rate was 36.6 percent (three patients on aspirin and eight on NOAC).

“Optimal antithrombotic management in ICH survivors with AF poses a challenging dilemma. Available data suggest that NOACs are a promising treatment option in this population,” Shoamanesh noted.

The present data, aside from establishing the feasibility of a controlled trial evaluating the efficacy and safety of NOACs vs aspirin, show that NOACs are potentially safe for stroke prevention in ICH survivors with AF, he added.

NASPAF-ICH paved the way for ENRICH-AF, a follow-up global phase III randomized trial of edoxaban vs nonanticoagulant medical therapy in 1,200 participants that is currently activating at multiple sites in 23 countries across five continents.

Shoamanesh acknowledged several limitations to the feasibility trial, including the exploratory nature of clinical outcomes and the limited generalizability of the results, given the tight blood pressure control noted in the population and the recruitment being restricted to Canada-based individuals.

*Non-vitamin K Oral Anticoagulants in Intracerebral Hemorrhage Survivors With Atrial Fibrillation-Intracranial Hemorrhage

**EdoxabaN foR IntraCranial Hemorrhage Survivors with Atrial Fibrillation

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Most Read Articles
24 May 2020
The use of capsule endoscopy (CE) appears to be effective in the diagnosis of iron deficiency anaemia (IDA), yielding a 33.9-percent yield in this study, with 65.8 percent of patients undergoing further workup and 12.7 percent requiring therapeutic intervention.
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4 days ago
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Stephen Padilla, 3 days ago
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