Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Randomized, Double-blind, Placebo-controlled, Multicenter Study to Assess Cardiovascular Outcomes Following Treatment With MK-3102 in Subjects With Type 2 Diabetes Mellitus
Brief Summary: The purpose of this study is to evaluate the cardiovascular (CV) safety profile of omarigliptin in participants with type 2 diabetes mellitus (T2DM). The primary hypothesis is that treatment with omarigliptin 25 mg once weekly is non-inferior to treatment with placebo and active comparators across the omarigliptin program with regard to the risk of developing a confirmed event in the primary CV composite endpoint.


Options:
A: Inclusion Criteria:

* Able to understand the written patient information and to give informed consent
* CHF, NYHA-class I, II or III at visit 0
* LVEF ≤45 %
* Age 30 to 85 (both inclusive)
* Stable pharmacological treatment of heart failure according to ESC guidelines for the last 3 months prior to randomisation (visit 1)

For patients with diabetes exclusively:

* T2D (WHO criteria), diagnosed at least 3 months prior to visit 0
* Patients with diabetes must be either untreated or treated with one or more oral anti-diabetic drugs or treated with human NPH-insulin or long-acting insulin analogue, alone or in combination with oral drugs
* Stable and optimal dose of anti diabetic treatment for 30 days prior to randomisation (visit 1)

Exclusion Criteria:

* Myocardial infarction (MI), unstable angina or coronary revascularization within the last three months prior to visit 1
* Hospitalisation due to incompensated heart disease within 30 days prior to randomisation (visit 1)
* CHF (NYHA class IV)
* ECG suggestive of malign ventricular arrhythmia at visit 0
* Type 1 diabetes
* HbA1c \> 10% measured at visit 0
* Use of GLP-1 receptor agonists (Exenatide, Liraglutide or other) or glitazones, pramlintide or any DPP-IV inhibitor within 30 days prior to randomisation (visit 1)
* Known or suspected hypersensitivity to trial product or related products
* Alcohol/drug abuse
* Pregnant or nursing women
* Fertile women not using chemical (tablet/pill, depot injection of progesterone, subdermal gestagen implantation, hormonal vaginal ring or transdermal hormonal patch) or mechanical (spirals) contraceptives
* Cancer unless in complete remission for ≥5 years
* Liver disease with elevated plasma alanine aminotransferase (ALT) of more than three times the upper limit of normal (measured at visit 0 with the possibility of one repeat analysis within a week, and the last measured value as being conclusive)
* Inflammatory bowel disease
* Acute or chronic pancreatitis
* Gastroparesis
* Compromised kidney function (eGFR \< 30 ml/min), dialysis or kidney transplantation
* History of thyroidea adenoma or carcinoma
* Severely elevated blood pressure (systolic \>180 mmHg and/or diastolic \>105 mmHg)
* Other concomitant disease or treatment that according to the investigator's assessment makes the patient unsuitable for study participation
* Simultaneous participation in any other clinical intervention trial
* Receipt of an investigational drug with 30 days prior to visit 0
B: Inclusion Criteria:

* Patients must have a diagnosis of type 2 diabetes mellitus and greater than or equal to (\>=) 30 yrs old with history of cardiovascular (CV) event, or \>= 50 yrs old with high risk of CV events
* Patients must have inadequate diabetes control (as defined by glycosylated hemoglobin greater than or equal to 7.0% to less than or equal to 10.5% at screening) and be either (1) not currently on diabetes drug therapy or (2) on therapy with any approved class of diabetes drugs

Exclusion Criteria:

* A history of diabetic ketoacidosis, type 1 diabetes mellitus, pancreas or beta-cell transplantation, or diabetes secondary to pancreatitis or pancreatectomy
* History of one or more severe hypoglycemic (ie, very low blood sugar) episode within 6 months before screening
C: Inclusion criteria:

* Male or female patient age \>= 18 years at screening. For Japan only: Age \>= 20 years at screening
* Patients with chronic HF (Chronic Heart Failure) NYHA (New York Heart Association Classification) class II-IV and reduced EF (Ejection Fraction) (LVEF (Left Ventricular Ejection Fraction) \<=40%) and elevated NT-proBNP (N-terminal of the prohormone brain natriuretic peptide)

  * If EF \>= 36% to \<= 40%: NT-proBNP \>= 2500 pg/ml or patients without AF (atrial fibrillation/atrial flutter) and NT-proBNP \>= 5000 pg/ml for patients with AF
  * If EF \>= 31% to \<= 35%: NT-proBNP \>= 1000 pg/ml for patients without AF and NT-proBNP \>=2000 pg/ml for patients with AF
  * If EF\<= 30%: NT-proBNP \>= 600 pg/ml for patients without AF and NT-proBNP \>=1200 pg/ml for patients with AF
  * EF ≤ 40% and hospitalization for heart failure in the past 12 months: NTproBNP ≥ 600 pg/ml for patients without AF and NT-proBNP \>= 1200 pg/ml for patients with AF
* Appropriate dose of medical therapy for HF consistent with prevailing local and international CV (Cardiovascular) guidelines, stable for at least 1 week prior to Visit 1
* Appropriate use of medical devices such as cardioverter defibrillator (ICD) or a cardiac resynchronization therapy (CRT) consistent with prevailing local or international CV guidelines
* Signed and dated written ICF (Informed Consent Form)
* Further inclusion criteria apply

Exclusion criteria:

* Myocardial infarction, coronary artery bypass graft surgery, or other major cardiovascular surgery, stroke or TIA (Transient Ischaemic Attack) in past 90 days prior to Visit 1
* Heart transplant recipient, or listed for heart transplant
* Acute decompensated HF
* Systolic blood pressure (SBP) \>= 180 mmHg at Visit 2.
* Symptomatic hypotension and/or a SBP \< 100 mmHg
* Indication of liver disease
* Impaired renal function, defined as eGFR (Estimated Glomerular Filtration Rate) \< 20 mL/min/1.73 m2 (CKD-EPI (Chronic Kidney Disease - Epidemiology Collaboration Equation)) or requiring dialysis
* History of ketoacidosis
* Current use or prior use of a SGLT (Sodium-glucose co-transporter)-2 inhibitor or combined SGLT-1 and 2 inhibitor
* Currently enrolled in another investigational device or drug study
* Known allergy or hypersensitivity to empagliflozin or other SGLT-2 inhibitors
* Women who are pregnant, nursing, or who plan to become pregnant while in the trial
* Further exclusion criteria apply
D: Inclusion Criteria:

* Diagnosed with type 2 diabetes mellitus
* Is on one of the following diabetes treatment regimens that is stable for at least 12 weeks (except for pioglitazone for at least 16 weeks) and is within the associated A1C range for that treatment regimen:

  1. A1C \>= 6.5% and \<= 10.0% (\>=48 mmol/mol and \<=86 mmol/mol) on: (a) diet or exercise alone (not on antihyperglycemic agent \[AHA\] for \>= 12 weeks) OR (b) monotherapy with metformin (MF), pioglitazone (PIO) or an alpha-glucosidase inhibitor (AGI) or a sodium-glucose cotransporter inhibitor (SGLT2i) OR (c) dual combination therapy with MF, PIO, AGI or SGLT2i OR
  2. A1C \>= 7.0% and \<=10.0% (\>=53 mmol/mol and \<=86 mmol/mol) on (a) monotherapy with a sulfonylurea or meglitinide OR (b) dual combination therapy with a sulfonylurea or a meglitinide and MF, PIO, AGI, or SGLT2i OR
  3. A1C \>=7.0% and \<=10.0% (\>=53 mmol/mol and \<=86 mmol/mol) on one of the following insulin regimens (with or without metformin): (a) basal insulin (e.g.; insulin glargine, insulin detemir, NPH insulin, degludec) OR (b) prandial insulin (e.g. regular, aspart, lispro, glulisine) OR (c) basal/prandial insulin regimen consisting of multiple dose insulin injections of basal and prandial insulin or the use of pre-mixed insulin (e.g., Novolog 70/30®, Novolin 70/30®, Humalog 75/25®, or Humulin 70/30®
* Pre-existing vascular disease (coronary artery disease, ischemic cerebrovascular disease, atherosclerotic peripheral artery disease)
* (1) Male; (2) female not of reproductive potential; or (3) female of reproductive potential who agrees to remain abstinent or use alone or in conjunction with their partner 2 methods of contraception to prevent pregnancy during the study and for 21 days after the last dose of study drug.

Exclusion Criteria:

* History of type 1 diabetes mellitus or a history of ketoacidosis
* Treated with rosiglitazone, a dipeptidyl peptidase-IV (DPP-4) inhibitor, or a glucagon-like peptide-1 (GLP-1) receptor agonist within 12 weeks prior to study participation or previously treated with omarigliptin
* On a weight loss program and is not in the maintenance phase or has been on a weight loss medication in the past 6 months or has undergone bariatric surgery within 12 months prior to study participation
* Medical history of active liver disease (other than non-alcoholic hepatic steatosis), including chronic active hepatitis B or C, primary biliary cirrhosis, or symptomatic gallbladder disease
* Human immunodeficiency virus (HIV) as assessed by medical history
* New or worsening coronary heart disease, congestive heart failure, myocardial infarction, unstable angina, coronary artery intervention, stroke, or transient ischemic neurological disorder within the past 3 months
* History of malignancy \<=5 years prior to study participation, except for adequately treated basal cell or squamous cell skin cancer, or in situ cervical cancer
* Clinically important hematological disorder (such as aplastic anemia, myeloproliferative or myelodysplastic syndromes, thrombocytopenia)
* Pregnant or breast feeding, or is expecting to conceive or donate eggs during the trial, including 21 days following the last dose of study drug

Answer: D