To characterize the physiological signals collected from a Wearable Cardiac Monitor (WCM) prototype device in subjects with heart failure and preserved ejection fraction (HFpEF) and compare against signals from subjects with heart failure and reduced ejection fraction (HFrEF).

To evaluate the relationship of physiological signals measured from a wearable cardiac monitor (WCM) prototype device with ECHO measures of systolic and diastolic function

This is a non-randomized, feasibility study that will enroll up to 100 participants clinically diagnosed with HFpEF or HFrEF. Approximately 70% of participants will have HFpEF and 30% will have HFrEF.

There will be one study visit per participant. The study visit includes device placement and data collection during postural changes. Echocardiograms will also be collected throughout the study and at least 30% of participants will undergo a submaximal exercise test. The device will then be removed.

Inclusion Criteria:

• Patients with NYHA class II or III heart failure defined by symptoms and signs of heart failure
• Documented episode of decompensated heart failure in the past 3 years, which either: a) resulted in a hospital admission (primary diagnosis) or b) was treated in out-patient clinic
• HFrEF defined by documented evidence of EF ≤ 40% OR
• HFpEF defined by documented evidence of:
• EF ≥ 50% and no prior record of EF < 40%
• Evidence of relevant structural heart disease or diastolic dysfunction on echocardiographic as defined in the 2016 ESC guidelines
• Able to understand and willing to provide written informed consent to participate in the trial
• Age 21 years old or greater
• Willing and able to participate in the required testing

Exclusion Criteria:

• Prior hospitalization, CV event or surgery within 6 weeks
• Subject is currently enrolled in another clinical trial (excluding registries) that may interfere with the placement of the study system or include the usage of investigational drugs.
• Patients with Active Implantable Medical Devices
• Known allergy to materials used in the study (adhesive tape, titanium, ECG electrodes)
• Have a prosthetic cardiac valve, previously underwent cardiac valve surgery or have hemodynamically unstable (as judged by local investigator) valvular disease
• Subject is pregnant as indicated by patient record
• Patients with rash or open wound on torso locations where investigational devices will be placed
• Patient deemed as clinically unstable or unsuitable to perform prescribed testing as judged by the local investigator

Patients that are diagnosed with NYHA class II or III heart failure with preserved or reduced ejection fraction.