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Pacemaker - Mayo Clinic
Jun 4, 2025 · Single chamber pacemaker. This type usually sends electrical signals to the lower right chamber of the heart. Dual chamber pacemaker. This type sends electrical signals to the …
Medulloblastoma - Symptoms and causes - Mayo Clinic
Feb 21, 2025 · Medulloblastoma is the most common cancerous brain tumor in children. Treatment usually includes a combination of surgery, radiation and chemotherapy.