👉 Ululations are small, rapid bursts of blood flow in the brain that occur during a cardiac arrhythmia. They can be caused by various conditions such as ventricular fibrillation or atrial fibrillation. Ululations may lead to sudden and potentially life-threatening symptoms like syncope (fainting) or arrhythmias (irregular heartbeats). It is important for healthcare providers to monitor patients closely when experiencing ululations, especially if they are occurring rapidly.