To this end we analyzed 24 h blood pressure and heart rate recordings using continuous
and simultaneous intra-arterial brachial pressure and non-invasive finger arterial blood pressure tracings. Data were obtained in 14 hypertensive patients and in 8 healthy
normotensive volunteers as part of a previous study [23]. Aortic pressure reconstructed from both brachial and finger pressures were analyzed to determine indices, which are
accepted as parameters related to cardiac oxygen supply, cardiac oxygen demand, and the supply–demand ratio. We hypothesized that besides the well known increase in cardiac
oxygen demand indices, additionally cardiac oxygen supply
will decrease after rising.