 Following informed consent and applying the inclusion and exclusion criteria, all eligible patients will undergo physical examination including weight, vital signs blood pressure, heart rate, respiratory rate, O2 saturation by pulse oximetry and a full assessment of CHF status by physical examination lung auscultation, assessment of leg edema, weight, JVP etc.. See figure 2. An ECG recording will be performed and a blood test for BNP will be drawn for all patients. 