MRV Head Without and With IV Contrast There is no relevant literature to support the use of MRV head without and with IV contrast in the initial imaging evaluation of primary migraine or TTH with a normal neurologic examination. MRV Head Without IV Contrast There is no relevant literature to support the use of MRV head without IV contrast in the initial imaging evaluation of primary migraine or TTH with a normal neurologic examination. Variant 3: Primary trigeminal autonomic cephalalgias (eg, cluster headache). Initial imaging. The ICHD-3 describes TACs as attacks of severe, strictly unilateral pain, which are orbital, supraorbital, temporal, or in any combination of these sites, lasting 15 to 180 minutes and occurring from once every other day to 8 times a day. Associated symptoms include ipsilateral conjunctival injection, lacrimation, nasal congestion, rhinorrhea, forehead and facial sweating, miosis, ptosis and/or eyelid edema, with or without restlessness or agitation. This predilection for the ophthalmic nerve (V1) distribution and associated autonomic symptoms help differentiate TACs from trigeminal neuralgia, which is a different disease. They are further classified as chronic or episodic, with 10% to 15% of patients suffering from chronic cluster headaches. Other subtypes include paroxysmal hemicranias (2-30 minutes), short-lasting unilateral neuralgiform headache attacks (1-600 seconds), hemicrania continua, and probable TAC. The short-lasting unilateral headache attacks are further characterized in 2 types: short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing and short-lasting unilateral neuralgiform headache attacks with cranial autonomic symptoms [23]. TACs are, as a group, an uncommon primary headache disorder, with cluster headaches being the most common, characterized by a prevalence of 0.1% to 0.4% and a male predominance [29,30].
Headache PCAs. MRV Head Without and With IV Contrast There is no relevant literature to support the use of MRV head without and with IV contrast in the initial imaging evaluation of primary migraine or TTH with a normal neurologic examination. MRV Head Without IV Contrast There is no relevant literature to support the use of MRV head without IV contrast in the initial imaging evaluation of primary migraine or TTH with a normal neurologic examination. Variant 3: Primary trigeminal autonomic cephalalgias (eg, cluster headache). Initial imaging. The ICHD-3 describes TACs as attacks of severe, strictly unilateral pain, which are orbital, supraorbital, temporal, or in any combination of these sites, lasting 15 to 180 minutes and occurring from once every other day to 8 times a day. Associated symptoms include ipsilateral conjunctival injection, lacrimation, nasal congestion, rhinorrhea, forehead and facial sweating, miosis, ptosis and/or eyelid edema, with or without restlessness or agitation. This predilection for the ophthalmic nerve (V1) distribution and associated autonomic symptoms help differentiate TACs from trigeminal neuralgia, which is a different disease. They are further classified as chronic or episodic, with 10% to 15% of patients suffering from chronic cluster headaches. Other subtypes include paroxysmal hemicranias (2-30 minutes), short-lasting unilateral neuralgiform headache attacks (1-600 seconds), hemicrania continua, and probable TAC. The short-lasting unilateral headache attacks are further characterized in 2 types: short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing and short-lasting unilateral neuralgiform headache attacks with cranial autonomic symptoms [23]. TACs are, as a group, an uncommon primary headache disorder, with cluster headaches being the most common, characterized by a prevalence of 0.1% to 0.4% and a male predominance [29,30].