Dynamic Variation of Impedance Cardiography(DYVIC) as a Diagnostic Tool of Acute Heart Failure (AHF) (DYVIC)
Acute Heart Failure

About this trial
This is an interventional diagnostic trial for Acute Heart Failure focused on measuring bio-impedance, BIOPAC system, dyspnea, acute heart failure
Eligibility Criteria
Inclusion Criteria:
- 18 year old or above
- non traumatic acute dyspnea
Exclusion Criteria:
- age <18 years,
- cardio respiratory arrest,
- coma,
- shock,
- need for inotropic or vasoactive drugs,
- mechanical ventilation,
- severe and sustained rhythm disorders,
- severe mitral valve disease,
- severe pulmonary arterial hypertension
- renal insufficiency with creatinine>150 μmol/l.
Sites / Locations
- Emergency Department
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Experimental
Experimental
Experimental
Experimental
patients with acute dyspnea
the sitting position
a passive leg rising maneuver
Valsalva maneuver
patients presenting to the emergency department with acute onset dyspnea are assessed for acute heart failure using the bio impedance technology (BIOPAC system) to measure the cardiac output in different clinical situations. FIRST: the cardiac output (CO) is measured at the reference position. Inbetween each step the patient was put in the reference position during 5 minutes.
the patient is put at the sitting position and we measure the cardiac output by BIOPAC system (patient is put to a 90 degree sitting position during 1 to 2 minutes then the CO is measured 5 minutes later)
we make a passive leg rising and we measure the cardiac output by BIOPAC system (45 degree passive leg rising was done for 1 to 2 minutes and CO was measured during the maneuver 5minutes later.)
the patient was asked to perform the Valsalva maneuver and we measure the cardiac output by BIOPAC system(patients are asked to perform the Valsalva maneuver by executing a forced blow into a manometer for 30 seconds and the CO is calculated during this test.)