HCM, the pumping function is normal. but the heart muscle is thickened and. stiff, making it difficult for the heart to. relax and for blood to fill the heartâs. chambers. This limited filling prevents. the heart from supplying enough blood. to the body, especially during exercise.
What is Migraine? Migraine is a neurological disease characterized by episodic moderate to severe headaches with associated other neurological symptoms predominately autonomic symptoms. Typically, the headache affects one side of the head, is pulsating in nature, and can last up to 3 days.
About Cluster Headaches. Cluster headache-the most severe form of primary headache-involves sudden, extremely painful headaches that occur in clusters, usually at the same time of the day and night for several weeks.They strike one side of the head, often behind or around one eye, and may be preceded by a migraine-like aura and nausea.luster headaches are characterized by excruciating, piercing pain on one side of the head and eye; they occur more frequently in men than women. PubMed Health Glossary.