Radar des Essais Cliniques

Subjects must not meet ANY of the following Exclusion Criteria to participate in the Trial:

1. STEMI ≤24 hours from the onset of ischemic symptoms or at any time if mechanical complications of transmural infarction are present (e.g., VSD, papillary muscle rupture, etc.)

2. Cardiogenic shock (SBP <80 mmHg for ≥30 mins and not responsive to intravenous fluids or hemodynamic deterioration for any duration requiring pressors or mechanical circulatory support, including IABP)

3. Subject is presently or recently intubated for the current admission (NOTE: recently intubated patients must be extubated for >24 hours with full neurologic recovery)

4. Cardiorespiratory arrest related to the current admission unless subject is extubated for >24 hours with full neurologic recovery and hemodynamically stable

5. Any contraindication or inability to Impella placement in both the left and right common femoral artery based on clinical or imaging findings, including iliofemoral artery diameter <5 mm, tortuous vascular anatomy or severe bilateral peripheral vascular disease of the iliac or femoral arteries that can't be adequately treated (e.g., with intravascular lithotripsy)

   NOTES:

   1. Computed tomography (CT), magnetic resonance angiography (MRA) or contrast angiography to assess the aorta and iliofemoral vasculature to ensure Impella compatibility must be performed within 90 days prior to randomization. It is recommended that this evaluation be performed prior to the index procedure. Absent a qualifying pre-procedure imaging study, contrast angiography of the potential Impella access vessel(s) must be performed in the Cath Lab before the planned enrollment after which the subject may be randomized if he/she still qualifies. Of note, if pre-procedure imaging was performed and after this test but before randomization there was a worsening in PVD symptoms, repeat imaging must be performed prior to randomization.
   2. If iliofemoral peripheral vascular disease is present precluding Impella use that can be adequately treated with angioplasty, atherectomy or lithotripsy (without a stent), the subject can be enrolled if such treatment is undertaken and is successful and uncomplicated - randomization must not be performed until such successful and uncomplicated treatment

6. Iliofemoral stents placed within 6 months of enrollment with planned vascular access through these vascular segments

7. Vascular access for Impella is required in any location other than the left or right common femoral artery (i.e., axillary access, transcaval access, etc., for Impella access are not permitted)

8. Known left ventricular thrombus

9. Incessant ventricular arrhythmias that would likely preclude stable Impella positioning

10. Severe aortic stenosis or severe aortic insufficiency

11. Prior mechanical valve or self-expanding TAVR (NOTE: prior bioprosthetic surgical valve or balloon expandable TAVR implanted >24 hours pre-procedure is acceptable)

12. Prior CABG within three (3) months or successful prior PCI of at least one (1) attempted lesion within 12 months (including during the index hospitalization prior to randomization), that has not experienced stent thrombosis or restenosis during that 12-month period; the one (1) exception is that patients may be enrolled if a primary PCI for STEMI was performed during the index hospitalization without MCS and that was ≥24 hours and <30 days prior to randomization.

    NOTE: Successful PCI for this exclusion criterion is defined as a visually-assessed angiographic DS ≤50% in at least one (1) attempted lesion.

13. Prior placement of IABP, Impella or any other MCS device for any reason during the index admission, prior to randomization

14. Known severe pulmonary hypertension (right ventricular systolic pressure (RVSP) on echo or pulmonary artery systolic pressure (PASP) on right heart catheterization) >70 mm Hg unless active vasodilator therapy in the Cath Lab is able to reduce the pulmonary vascular resistance (PVR) to <3 Wood Units or between 3 and 4.5 Wood Units with v-wave less than twice the mean of the pulmonary capillary wedge pressure

15. Symptoms or signs of severe RV dysfunction, such as anasarca (NOTE: Leg edema alone does not necessarily indicate severe RV dysfunction if the investigator believes it is due to LV dysfunction)

16. Severe tricuspid insufficiency

17. Platelet count <75,000 cells/mm3, bleeding diathesis or active bleeding, coagulopathy or unwilling to receive blood transfusions

18. On dialysis

19. Prior stroke with any permanent neurologic deficit within the previous three (3) months, or any prior intracranial hemorrhage or any prior subdural hematoma or known intracranial pathology pre-disposing to intracranial bleeding, such as an arteriovenous malformation or mass

20. Taking a chronic oral anticoagulant that cannot be safely discontinued for at least 72-hours before and 72-hours after the index procedure (if a vitamin K antagonist) or that cannot be safely discontinued for at least 48 hours before and 48 hours after the index procedure (for a direct acting oral anticoagulant)

21. Plan for any surgery within 6 months necessitating discontinuing antiplatelet agents

22. Pregnant or child-bearing potential unless negative pregnancy test within 1 week

23. Participation in the active treatment or follow-up phase of another clinical study of an investigational drug or device that has not reached its primary endpoint

24. Any medical or psychiatric condition such as dementia, alcoholism or substance abuse which may preclude informed consent or interfere with any of the study procedures, including follow-up visits

25. Any non-cardiac condition with life expectancy <3 years (e.g., cirrhosis, oxygen or oral steroid dependent COPD, cancer not in remission, etc.)

26. Subject is currently hospitalized for definite or suspected COVID-19

27. Subject has previously been symptomatic with or hospitalized for COVID-19 unless he/she has been discharged (if hospitalized) and asymptomatic for ≥4 weeks and has returned to his/her prior baseline (pre-COVID) clinical condition

28. Subject is asymptomatic (never ill) and COVID-19 PCR/antigen test is positive within the prior four (4) weeks unless a) subject remains asymptomatic for ≥2 weeks after the last positive test or b) the positive test occurred within six (6) months after the subject received a COVID vaccine

29. Subject belongs to a vulnerable population (defined as individuals with mental disability, impoverished persons, homeless persons, nomads, refugees and those permanently incapable of giving informed consent; vulnerable populations also may include members of a group with a hierarchical structure such as university students, subordinate hospital and laboratory personnel, employees of the Sponsor, members of the armed forces and persons kept in detention)