English to German Medical Medical: Cardiology

Episodes of vasoplastic angina don’t correlate with exertion and
can happen anytime, including at rest. The underlying mechanism causing vasospasms isn’t
well understood, but likely involves vasoconstrictors like ***platelet thromboxane A2***. Unlike both
stable and unstable angina, in this case the coronary artery’s constricted so severely
that all layers of the heart wall being supplied are affected, therefore it’s referred to
as transmural ischemia.

I found Thromboxan A2 in German texts, but I don't know what to do about the platelet part. I looked for Plättchen Thromboxan A2 and Thrombozyten Thromboxan A2, but the links I found did not really convince me.

Thanks so much for your input!!!