Carotid Pulse
The term for the carotid artery pulsation felt with each heartbeat is simply called the carotid pulse or carotid pulsation.
Understanding Carotid Pulsations
The carotid arteries, being large elastic vessels, naturally expand and contract in synchrony with each cardiac cycle 1. This rhythmic pulsation reflects the pressure wave generated by ventricular contraction traveling through the arterial system. The pulsation is palpable at the site where the common carotid artery is located—between the angle of the jaw and the cricoid cartilage on the anterior margin of the sternocleidomastoid muscle 2.
Clinical Context
Assessment Technique
When checking the carotid pulse, manual compression is applied with the fingertips at the site of maximum carotid pulsation 2. The face should be rotated contralaterally during examination 2.
Diagnostic Considerations
- Normal physiology: The internal carotid artery demonstrates a more pulsatile flow pattern compared to the external carotid artery, which exhibits continuous diastolic flow between systolic pulses 3
- Pathological changes: Significant arterial stenosis (≥50% diameter narrowing) can reduce these normal pulsations 1
- Ultrasound imaging: The natural pulsations of the vessel can be visualized using B-mode guided M-mode imaging, measuring maximal and minimal lumen diameters throughout the cardiac cycle 3
Important Caveats
When palpating the carotid pulse for clinical assessment (such as during resuscitation), lay people require an average of 9.46 seconds to correctly detect the pulse, with only 47.4% able to do so within 5 seconds 4. Even trained individuals may take longer than the traditionally recommended pulse check intervals, which has implications for CPR protocols.