Pengaruh guided imagery abdominal breathing dan kombinasinya terhadap respon kecemasan psikofisiologis pasien yang menjalani kateterisasi jantung elektif di Rumah Sakit Pusat Jantung dan Pembuluh Darah Harapan Kita Jakarta = The effect of guided imagery abdominal breathing and its combination on anxiety psychophysiological response of patients undergoing elective cardiac catheterization at the hospital cardiovascular center Harapan Kita Jakarta