Occlusion of common carotid artery on both sides leads to
|A||Increases in HR & BP|
|B||Increases in BP & decreases in HR|
|C||Decrease in HR & BP|
|D||NO effect on BP & HR|
- “CNS Ischaemic response → control of arterial pressure by the Brain’s vasomotor centre in response to diminished brain blood flow”: →
a. ↓Brain blood flow →cerebral Ischaemia→vasomotor centre excited →Systemic Arterial pressure often rises to a level as high as heart can possibly pump
b. sympathetic stimulation →↑HR
[Note →by occlusion of common carotid artery both side →↓Brain blood flow →CNS ischaemia] Q
- → Hypoxia → brain affected first c/f →
a. Less severe hypoxia causes - impaired judgement, drowsiness, dulled pain sensibility, excitement, disorientation, loss of time sense, and Headache.
b. Other symptoms/signs →Anorexia, nausea, vomiting, Tachycardia (↑HR), and when the hypoxia is severe, Hypertension (↑B P).