case_images: PMC7332489_01
case_images: Preoperative axial computed tomography (CT) (a) demonstrating subarachnoid haemorrhage. Three-dimensional reconstructed CT angiogram (b) showing a large internal carotid- posterior communicating artery aneurysm with a bleb (arrow).
case_images: SNI-11-156-g001.jpg
case_images: PMC7332489_01_SNI-11-156-g001.jpg
case_images: F1
case_images: Head computed tomography revealed SAH, and computed tomography arteriogram showed a carotid-posterior communicating artery aneurysm with a bleb [Figure 1].
case_images: Electrocardiogram on admission.
case_images: SNI-11-156-g002.jpg
case_images: PMC7332489_01_SNI-11-156-g002.jpg
case_images: F2
case_images: Continuous ECG monitoring on admission showed sinus tachycardia (mean: 120 beats/min) with frequent ventricular premature complexes [Figure 2].
case_images: Preoperative (a) and postoperative (b) left internal carotid artery angiogram (frontal view). The low flow in the internal carotid-posterior communicating artery aneurysm (arrow) disappeared after endovascular treatment.
case_images: SNI-11-156-g003.jpg
case_images: PMC7332489_01_SNI-11-156-g003.jpg
case_images: F3
case_images: The patient agreed to endovascular treatment to prevent rebleeding, and coil embolization for the ruptured aneurysm was performed under general anesthesia on postbleed day (PBD 1) [Figure 3].
case_images: Electrocardiogram in the intensive care unit showing bradycardia and repetitive transient severe asystole.
case_images: SNI-11-156-g004.jpg
case_images: PMC7332489_01_SNI-11-156-g004.jpg
case_images: F4
case_images: Worsening bradycardia and repetitive transient asystole lasting 3-12 s with hypotension occurred during postoperative care in the intensive care unit [Figure 4].