Enrollment rate too low; rate much under estimation of sponsor and investigators

The purpose of this study is to measure impedance during inpatient treatment.

Inclusion Criteria:

• patients admitted to hospital for symptoms of congestive heart failure
• patients older than 18 years
• patients willing and able to give informed consent

Exclusion Criteria:

• patients who will require adrenergic or positive inotropic medications
• patients enrolled in a concurrent study that may confound the results of this study
• patients unable or unwilling to participate in study procedures
• patients who are pregnant
• patients who are mentally handicapped or legal incompetent
• patients who are dependent on investigator or sponsor