PCSK9 Inhibitor

The aim of this clinical trial is to understand whether the drug PCSK9 inhibitor can slow the progression of calcific aortic valve disease and to understand the safety of the drug. The primary objective of the study was to evaluate whether PCSK9 inhibitors could delay the progression of aortic stenosis in patients with aortic stenosis. Secondary objectives: 1) To evaluate whether PCSK9 inhibitors can delay the progression of valve calcification in patients with aortic stenosis;2) To evaluate whether PCSK9 inhibitors can reduce long-term adverse events in patients with aortic stenosis;3) To evaluate the effect of PCSK9 inhibitors on circulating Lp(a) levels in patients with aortic stenosis.

The goal of this clinical trial is to test the effect of proprotein convertase subtilisin/kexin type 9 (PCSK9 inhibitors) in acute ischemic stroke patients associated with atherosclerosis by investigating 1. the change in lipid profile compared to baseline results 2. the effects on prognosis of stroke The participants will be given PCSK9 inhibitor right after confirmation of acute ischemic stroke, and the investigators will compare the results to the control group, whom are acute ischemic stroke patients treated with conventional lipid lowering therapy, statin and/or ezetimibe.