Arterial Pressure Monitoring in Cardiac Surgery

Arterial pressure monitoring is integral to the management of patients undergoing cardiac surgery, providing real-time data to guide fluid management, vasoactive therapy and perfusion strategies. Invasive monitoring through arterial catheterisation allows continuous measurement of systolic, diastolic and mean arterial pressures, essential during cardiopulmonary bypass and in the immediate postoperative period. Selection of cannulation site—most commonly the radial or femoral artery—affects accuracy, waveform fidelity and risk profile, with site-specific variations influenced by vascular tone, vessel diameter and vasoactive drug effects. Proper calibration, zeroing and dynamic response of the pressure transducer system are critical to avoid artefactual damping or resonance. Advanced waveform analysis and derived haemodynamic indices, such as pulse pressure variation, augment assessment of volume responsiveness and cardiac function. Continuous monitoring supports rapid detection of haemodynamic instability, optimises organ perfusion and informs therapeutic decisions from induction of anaesthesia to intensive care management.

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Arterial Pressure Monitoring in Cardiac Surgery publication trend

The graph below shows the total number of articles in arterial pressure monitoring in cardiac surgery across all publications each year (not limited to Nature Index journals).

Technical terms

Mean arterial pressure (MAP): average pressure in the arteries during one cardiac cycle, reflecting perfusion pressure to vital organs.

Cardiopulmonary bypass (CPB): the extracorporeal circuit that circulates and oxygenates blood during open-heart surgery when cardiac function is halted.

Radial artery cannulation: insertion of an arterial catheter into the radial artery for continuous blood pressure measurement at a peripheral site.

Femoral artery cannulation: insertion of an arterial catheter into the femoral artery to capture more central arterial pressure values.

Pressure gradient: the numerical difference in arterial pressure measurements between two monitoring sites, often central and peripheral.

References

1. Peripheral arterial blood pressure versus Central Arterial Blood Pressure Monitoring in Critically Ill Patients after Cardio-pulmonary Bypass. Pakistan Journal of Medical Sciences (2017).
2. Central-Radial Artery Pressure Gradient after Cardiopulmonary Bypass Is Associated with Cardiac Function and May Affect Therapeutic Direction. PLOS ONE (2013).