The innovative non-invasive measuring system Arteriograph can determine the following parameters and make individual statements about the vessel characteristics (function, vessel age) by means of a special pulse wave analysis. The parameters measured are described below:
Brachial blood pressure values
The Arteriograph measures the common peripheral blood pressure values, such as systolic and diastolic blood pressure (Sys & Dia), brachial pulse pressure (PP), mean arterial pressure (MAD) and heart rate (HF).
Central aortal pulse wave velocity ➙ PUB
PWVao is determined by the properties of the aortic wall (see RT). The stiffer the aortic wall, the faster the PWVao. Elevated levels of PWVao could be related to an increased cardiovascular risk and possible damage to atherosclerotic organs. The assessment of arterial age is based on the PWVao values. Higher SBP and/or HR values may increase the value of PWVao.
Systolic range index / Diastolic range index ➙ PUB
Volumetric signals can be obtained by inflating the cuff to the diastolic cuff pressure. The area under the curve is assumed to be 100% and divided into the systolic (SAI) and diastolic (DAI) regions. In a normal and calm situation at normal heart rate, the SAI should be less than 50% and the DAI should be more than 50%. A DAI below 46% can be considered unusually low.
The Return Time refers to the return time of the aortic pulse wave. RT reflects the properties of the aortic wall. The stiffer the aortic wall, the lower the return time. RT is normal over 124 ms.
The ankle-arm index is determined in order to be able to detect peripheral arterial occlusive disease (paVK). In patients with arterial occlusive disease, the measurement serves to assess the circulatory disorder in the legs. The ABI is normally above 0.9
Central aortal pulse pressure
PPao is the difference between the central systolic and diastolic pressure. PPao is normally below 50 mmHg.
Aortal (central) systolic blood pressure ➙ PUB
With normal vascular elasticity, the aortic systolic blood pressure is lower than the peripheral brachial blood pressure. With increased vascular stiffness and arteriosclerosis, the central aortic blood pressure may be higher than the brachial BD. SBPao is below 120 mmHg in the normal range.
Central aortal augmentation index ➙ PUB
AIXao describes the peripheral resistance of arteries and arterioles and represents the effect of the reflected wave on the central systolic blood pressure. It is calculated as follows: AIXao = (P2-P1)/PP x 100. AIXao is normally below 33%.
Diastolic refelction area ➙ PUB
The left coronary artery supplies the left ventricle of the heart with blood and oxygen. However, this artery is mainly perfused during diastole. Thus, the diastolic perfusion pressure and the duration of diastole play a crucial role in the blood supply to the left ventricle. DRA is a complex dimensionless parameter that describes the intensity of diastolic wave reflection and its duration. The higher the DRA, the better the left coronary perfusion. DRA is normally above 40.
The ejection duration describes the ejection duration of the heart. ED is influenced by the heart rate.
The standard deviation refers to the standard deviation of the measured velocity values of the aortic pulse wave from beat to beat. The lower the SD, the better the quality of the recording. The Standard Deviation should be within the green range (0,0-0,7m/s). If the SD in the yellow range (0,7-1,0 m/s) the measurement is acceptable, but should be treated with caution.. The red range (>1,0 m/s) should not be accepted and the measurement must be repeated.