My Mother has been suffering from giddy spells for the last couple of months. She has been diagnosed with a heart condition ( Restrictive Cardiomyopathy) last year. She has high BP ( 160 /90 - 180 /90 etc.) Recent Echo Doppler has implied improvement of her heart condition. But giddy spells continue And happen more often in the evenings. Doctor has suggested a HUTT test. what does it mean ? & what is it Approx cost ?