Salivary Extracellular Vesicle Associated lncRNAs in Heart Failure (SEAL-HF)

Inclusion Criteria CHF:

* At least 18 years of age
* Stable disease defined as CHF of any type, New York Heart Association (NYHA) functional class II/III/IV, N-terminal pro-B-type natriuretic peptide (NT-proBNP) ≥600 pg/ml if Left Ventricular Ejection Fraction (LVEF) ≤30%; ≥1000 pg/mL if LVEF 31-35%; ≥2500 pg/mL if EF \>35%

Inclusion Criteria ADHF:

* At least 18 years of age
* Clinical signs and/or symptoms (including exertional or rest dyspnea, orthopnea or Paroxysmal Nocturnal Dyspnea (PND)) and N-terminal pro-BNP level \> 1000 pg/mL or BNP \> 400 pg/ml, OR Clinical evidence of congestion: X-ray evidence of pulmonary edema or pleural effusions, elevated Jugular Venous Pulse (JVP), lower extremity edema, or rales on pulmonary examination, right heart catheterization evidence of elevated filling pressures (Right Atrium (RA) pressure \> 10 mmHg; Pulmonary Capillary Wedge Pressure (PCWP) \> 18 mmHg) and clinical response to Intravenous (IV) diuretic therapy (as judged by a physician)

Inclusion Criteria control:

* At least 18 years of age
* Will/have undergone an EP procedure in the EP lab

Exclusion Criteria:

* Active pregnancy or lactation
* Cardiac amyloidosis
* Active malignancies