A system (300, 300') for treating hydrocephalus, comprising: a shunt (200, 200'), characterized in that the shunt (200, 200') is configured for being endovascularly deployed within an inferior petrosal sinus of a patient, the shunt (200, 200') comprising a distal portion (202, 202', 202") configured for being introduced into and secured within a cerebellopontine angle cistern of the patient via the IPS, the CP angle cistern containing cerebrospinal fluid, the distal portion (202, 202') including one or more CSF intake openings (201, 219, 229b, 253), wherein the distal portion self-expands from a collapsed delivery configuration to an expanded deployed configuration after it is deployed within the patient's CP angle cistern, a proximal portion (204, 204', 204") configured for being positioned within, or proximate to, a jugular vein of the patient, and a flexible body portion extending from the distal portion (202, 202', 202") to the proximal portion (204, 204', 204"), the flexible body portion comprising a lumen (207, 215, 217) in communication with the one or more CSF intake openings (201, 219, 229b, 253) in the distal portion (202, 202', 202"), and a valve disposed within or otherwise coupled to the shunt (200, 200') to regulate the rate of CSF flow within the shunt in a direction from the distal portion to the proximal portion of the shunt, such that, when the shunt (200, 200') is deployed in the IPS with the distal portion (202, 202', 202") of the shunt (200, 200') secured within the CP angle cistern and the proximal portion (204, 204', 204") of the shunt (200, 200') positioned within or proximate to the JV, CSF flows from the CP angle cistern into the JV through the respective one or more CSF intake openings (201, 219, 229b, 253), shunt lumen (207, 215, 217), and valve. a shunt (200, 200'), characterized in that the shunt (200, 200') is configured for being endovascularly deployed within an inferior petrosal sinus of a patient, the shunt (200, 200') comprising a distal portion (202, 202', 202") configured for being introduced into and secured within a cerebellopontine angle cistern of the patient via the IPS, the CP angle cistern containing cerebrospinal fluid, the distal portion (202, 202') including one or more CSF intake openings (201, 219, 229b, 253), wherein the distal portion self-expands from a collapsed delivery configuration to an expanded deployed configuration after it is deployed within the patient's CP angle cistern, a proximal portion (204, 204', 204") configured for being positioned within, or proximate to, a jugular vein of the patient, and a flexible body portion extending from the distal portion (202, 202', 202") to the proximal portion (204, 204', 204"), the flexible body portion comprising a lumen (207, 215, 217) in communication with the one or more CSF intake openings (201, 219, 229b, 253) in the distal portion (202, 202', 202"), and a valve disposed within or otherwise coupled to the shunt (200, 200') to regulate the rate of CSF flow within the shunt in a direction from the distal portion to the proximal portion of the shunt, such that, when the shunt (200, 200') is deployed in the IPS with the distal portion (202, 202', 202") of the shunt (200, 200') secured within the CP angle cistern and the proximal portion (204, 204', 204") of the shunt (200, 200') positioned within or proximate to the JV, CSF flows from the CP angle cistern into the JV through the respective one or more CSF intake openings (201, 219, 229b, 253), shunt lumen (207, 215, 217), and valve.