Patient description: A 62-year-old African-American man presented with left upper and lower extremity weakness, associated with dark visual spot in right eye, right facial numbness, facial drop and slurred speech. He denied dyspnea, headache, palpitations, chest pain, fever, dizziness, bowel or urinary incontinence, loss of consciousness. His medical history was significant for hypertension, hyperlipidemia and hypothyroidism. He smokes cigarette 1 pack per day for 40 years and alcohol consumption of 5 to 6 beers per week. He is not aware about his family history. He is using Levothyroxine, Atorvastatin and HTCZ. His vital signs were stable in the primary evaluation. Left-sided facial droop, dysarthria, and left-sided hemiplegia were seen in the physical exam. His National Institutes of Health Stroke Scale (NIHSS) score was calculated as 7. Initial CT angiogram of head and neck reported no acute intracranial findings. Intravenous recombinant tissue plasminogen activator (t-PA) was administered as well as high-dose statin therapy. The patient was admitted to the intensive care unit to be monitored for 24 hours. MRI of the head revealed an acute 1.7-cm infarct of the right periventricular white matter and posterior right basal ganglia.

Clinical trial eligibility criteria: eligible ages (years): 18.0-75.0,  Acute Pulmonary Embolism Patients with high-risk acute pulmonary embolism: the main manifestations are shock and hypotension.Systemic systolic blood pressure <90 millimetre of mercury (mmHg) (1mmHg=0.133kPa), or a decrease from the base value ≥40 millimetre of mercury for more than 15min Patients with moderate to high-risk acute pulmonary embolism who have worsened anticoagulant therapy require thrombolytic therapy: (Patients with moderate to high-risk acute pulmonary embolism: Right ventricular dysfunction (RVD) and elevated cardiac biomarkers coexist.) 1. RVD diagnostic imaging evidence including echocardiography or CT:1) Ultrasound examination is consistent with the following performance: 1. right ventricular dilatation (right ventricular end-diastolic diameter / left ventricular end-diastolic diameter > 1.0 or 0.9); 2. right ventricular free wall movement amplitude decreased; 3. tricuspid regurgitation speed increased; 4. tricuspid annulus systolic displacement decreased (<17mm); 2) Computed Tomographic Pulmonary Angiography examination meets the following conditions: right ventricular dilatation (right ventricular end-diastolic diameter / left ventricular end-diastolic diameter > 1.0 or 0.9) found at the four-chamber heart level; 2. Cardiac biological markers including N terminal pro B type natriuretic peptide (NT-proBNP/BNP) and troponin elevation; Diagnostic for worsening after anticoagulant therapy in patients with moderate to high risk acute pulmonary embolism: Hemodynamic deterioration (defined as meeting at least one of the following conditions: 1. requires cardiopulmonary resuscitation; 2. systemic systolic blood pressure <90 mmHg (1 mmHg = 0.133 kPa), or a decrease in basal value ≥ 40 mmHg for more than 15 min, or with terminal Low organ perfusion (limb cold or urine volume <30 ml/hr, or mental confusion); 3. need to infuse a booster drug (except dopamine <5 μg/kg/min) to maintain adequate tissue perfusion and systolic blood pressure > 90 mmHg  The time from onset to the time of thrombolysis is ≤ 14 days Male patients must agree to take effective contraceptive measures during treatment and at least 28 days after the end of the trial, and do not donate sperm during this period; women of childbearing age must be negative within the first 72 hours of randomization, and agree to adopt effective contraceptive measures during treatment and at least 28 days afterwards the last treatment Voluntary signing of written informed consent form  a history of hemorrhagic stroke or unexplained stroke Ischemic stroke or transient ischemic attack within 3 months Central nervous system damage or tumor Surgery and trauma of the brain or spine within 2 months Active internal bleeding within 1 month (such as gastrointestinal bleeding, hemoptysis, blood in the stool, etc.) High risk of bleeding: evidence or history of bleeding disorders, bleeding tendency, bleeding constitution or coagulopathy oral anticoagulant (can be randomized after a certain period of time, such as oral rivaroxaban can be randomized after 1 day of elution, oral warfarin can be performed at International Normalized Ratio <2.0 random) week after pregnancy or delivery vascular puncture of the site that cannot be oppressed Cardiopulmonary resuscitation within 10 days