Lack of Subject Recruitment

The purpose of this study is to evaluate the results of 99mTc maraciclatide scintigraphy in diabetic subjects with HFPEF. A maximum of 20 subjects with Diabetes Mellitus (DM) and Heart Failure With Preserved Left Ventricular Ejection Fraction (HFPEF) will be enrolled and imaged with 99mTc maraciclatide. In addition, a maximum of 10 subjects with DM and diastolic dysfunction but no diagnosis of heart failure (HF) will be enrolled and imaged with 99mTc-maraciclatide.

Inclusion Criteria:

• The subject is between 18 and 80 years of age.
• The subject was diagnosed with DM type 2 based upon accepted clinical criteria and currently takes at least one diabetes medication.
• For HF subjects: The subject was diagnosed with HF with preserved EF within the previous 1 year, at which time LVEF was determined to be ≥45%.
• For comparison subjects: The subject was determined to have diastolic dysfunction on EKG within the previous year and currently has no signs or symptoms of HF.
• The subject has been clinically stable for at least 7 days prior to the study imaging procedures (e.g., not experiencing continuing chest pain, hemodynamic instability, worsening HF symptoms, or clinically significant arrhythmia).

Exclusion Criteria:

• The subject had an acute myocardial infarction within the past 30 days.
• The subject had a cardiac revascularization (e.g., percutaneous transluminal coronary angiography [PTCA], percutaneous coronary intervention (PCI), or coronary artery bypass graft [CABG]) within the past 30 days.
• The subject has severe renal dysfunction.
• The subject is claustrophobic or has a movement disorder that prevents him/her from lying still in a supine position for up to 20 minutes at a time.
• The subject has participated in a research study using ionizing radiation in the previous 12 months.