Inclusion criteria:
• Age >18 years of age
• Chronic non-ischemic cardiomyopathy
• LVEF 15% ≤ 30% by transthoracic echocardiography (TTE) within 6 months prior to enrollment
• NYHA Class III HF for a minimum of 3 months HF despite appropriate medical therapy (defined below):
• Treatment with appropriate HF therapy as tolerated, including, but not limited to:
• Beta blocker therapy and angiotensin converting enzyme (ACE) inhibitor or angiotensin receptor blocker (ARB) or sacubitril/valsartan combination therapy (Entresto) for ≥ 90 days prior to enrollment. May also receive aldosterone antagonist therapy. Doses of the above medications must be stable for ≥ 30 days prior to enrollment; and
• Cardiac resynchronization therapy (CRT), if clinically indicated, must have been implanted ≥ 90 days prior to enrollment. Internal cardioverter defibrillator (ICD) must be implanted, if clinically indicated ≥ 30 days prior to enrollment
• Females of childbearing potential must use at least one of the following acceptable birth control methods throughout the study and for 6 months after IP administration:
• Surgically sterile (bilateral tubal ligation, hysterectomy, bilateral oophorectomy) 6 months minimum prior to IP administration
• Intrauterine device in place for at least 90 days prior to receiving IP
• Barrier methods (diaphragm plus spermicide or condom) starting at least 30 days prior to receiving IP
• Abstinence (the subject must be willing to remain abstinent from screening to 6 months after receiving IP). Females are allowed to claim abstinence as their method of contraception only when it is the preferred and usual lifestyle of the subject
• Surgical sterilization of the partner(s) (vasectomy) for >180 days prior to IP administration
• Hormonal contraceptives starting > 90 days prior to IP. If hormonal contraceptives are started less than 90 days prior to receiving IP, subjects must agree to use a barrier method (diaphragm plus spermicide or condom) from screening through 90 days after initiation of hormonal contraceptives
• Males subjects capable of fathering a child:
• Must agree to use a condom from IP administration through 6 months after the time of IP administration
• Must agree not to donate sperm for 6 months after time of receiving IP
• Documented evidence of vasectomy in males for 180 days minimum prior to receiving IP is an acceptable form of contraception
• Males who claim abstinence as their method of contraception are allowed provided they agree to use barrier methods should they become sexually active from screening through 6 months after receiving IP. Males are allowed to claim abstinence as their method of contraception only when it is the preferred and usual lifestyle of the subject
• Ability to sign Informed Consent Form (ICF) and Release of Medical Information Form
• Appropriate candidate for protocol-specified intracoronary infusion in the judgment of the infusing interventional cardiologist Cohort 3: medical history documentation of PLN-R14Del mutation and an ICD in situ (at least 30 days prior to enrollment)
• Chronic ischemic cardiomyopathy
• Intravenous (IV) inotropic therapy, intra-aortic balloon pump (IABP) or percutaneous cardiac assist device therapy within 30 days prior to enrollment
• Restrictive cardiomyopathy, obstructive cardiomyopathy, pericardial disease, amyloidosis, infiltrative cardiomyopathy, uncorrected thyroid disease, or dyskinetic LV aneurysm
• Cardiac surgery or percutaneous coronary intervention (PCI) within 30 days prior to enrollment
• Third degree heart block
• Clinically significant myocardial infarction (MI) in the judgment of the subject's physician (e.g., ST elevation MI [STEMI] or large non-STEMI) within 6 months prior to enrollment
• Prior heart transplantation, left ventricular reduction surgery (LVRS), cardiomyoplasty, passive restraint device (e.g., CorCap™ Cardiac Support Device), surgically implanted LVAD or cardiac shunt
• Likely to receive cardiac resynchronization therapy, cardiomyoplasty, LV reduction surgery, heart transplant, conventional revascularization procedure, or valvular repair within 3 months of IP dosing
• Known hypersensitivity to contrast dyes used for angiography; history of, or likely need for, high-dose steroid pretreatment prior to contrast angiography
• Expected survival < 1 year in the judgment of the investigator
• Active or suspected infection within 48 hours prior to enrollment as evidenced by fever or positive culture
• Known intrinsic liver disease (e.g., cirrhosis, hepatitis A, chronic hepatitis B or hepatitis C virus infection). If serology is positive and PCR is negative, subject may be eligible (confirm with medical monitor).
• Liver function tests (alanine aminotransferase [ALT], aspartate aminotransferase [AST], alkaline phosphatase) > 2x upper limit of normal (ULN) within 30 days prior to enrollment.
• Renal Failure, dialysis dependent or serum creatinine > 2.5 mg/dl within 30 days prior to enrollment
• Bleeding diathesis or thrombocytopenia defined as platelets <50,000 platelets/μL within 30 days prior to enrollment
• Anemia defined as hemoglobin <10 g/dL or transfusion dependent within 30 days prior to enrollment
• Neutropenia defined as absolute neutrophils <1500 mm3 within 30 days prior to enrollment
• Known AIDS or HIV-positive status, or a previous diagnosis of immunodeficiency with an absolute neutrophil count <1000 cells/mm3
• Previous participation in a study of gene transfer
• Receiving investigational intervention or participating in another clinical study within 30 days or within 5 half-lives of another investigational drug administration prior to administration of NAN-101 that may impact the therapeutic potential of NAN-101.
• Pregnancy or breastfeeding at the time of screening

1. Participant is < 21 years of age 2. Parent/ Legal Guardian/ Adult Participant can understand the consent process and is willing to provide informed consent/HIPAA: 3. (a) Participant is receiving one or more of the study drugs of interest at the time of enrollment or (b) Participant is NOT receiving one or more of the study drugs of interest but is SARS-COV-2 positive within 60 days prior to enrollment 1. Participant has a known pregnancy Below exclusion criteria apply only to: Participants receiving one or more of the study drugs of interest at the time of enrollment, DOI administration or PK sampling: (Refer to DOI specific appendices for details on enrollment cohort specifications and additional eligibility criteria) 2. Has had intermittent dialysis within previous 24 hours 3. Has had a kidney transplant within previous 30 days 4. Has had a liver transplant within previous 1 year 5. Has had a stem cell transplant within previous 1 year 6. Has had therapeutic hypothermia within previous 24 hours 7. Has had plasmapheresis within the previous 24 hours 8. Has a Ventricular Assist Device 9. Has any condition which would make the participant, in the opinion of the investigator, unsuitable for the study

The following is a list of general inclusion criteria:
• Age ≥ 18 years
• Left Ventricular Ejection Fraction (LVEF) < 30%
• NYHA Class III with dyspnea upon mild physical activity or Class IV heart failure
• Inotrope dependent OR Cardiac Index (CI) < 2.2 L/min/m2, while not on inotropes
• Patient is able to provide written informed consent
• More detailed inclusion criteria information is noted in the study protocol 1. Etiology of heart failure due to or associated with uncorrected thyroid disease, obstructive cardiomyopathy, pericardial disease, amyloidosis, or restrictive cardiomyopathy 2. Technical obstacles which pose an inordinately high surgical risk 3. Existence of ongoing mechanical circulatory support (MCS) other than IABP and Impella 5.0 or 5.5 4. Ongoing Impella (5.0 or 5.5) presenting related clinical sign (i.e. hematuria) and elevated LDH equal or greater than 600 IU/L. 5. Positive pregnancy test if of childbearing potential 6. Presence of mechanical aortic cardiac valve that will not be either converted to a bioprosthesis 7. History of any organ transplant 8. Platelet count <100,000/mL 9. Psychiatric disease/disorder, irreversible cognitive dysfunction or psychosocial issues 10. History of confirmed, untreated abdominal aortic aneurysm (AAA) > 5 cm in diameter within 6 months of enrollment 11. Presence of an active, uncontrolled infection 12. Intolerance to anticoagulant or antiplatelet therapies or any other peri/postoperative therapy that the investigator will require based upon the patient's health status 13. Presence of remarkable pre-defined end-organ dysfunction. 14. Patient has moderate to severe aortic insufficiency without plans for correction during pump implant 15. Low albumin
•removed from recent exclusion criteria 16. Planned Bi-VAD support prior to enrollment 17. Patient has known hypo- or hyper coagulable state such as disseminated intravascular coagulation and heparin induced thrombocytopenia (HIT) 18. Participation in any other clinical investigation that is likely to confound study results or affect the study 19. Any condition other than heart failure that could limit survival to less than 24 months 20. Patients refusing blood transfusion