CREATE TABLE table_train_38 ("id" INT, "left_ventricular_ejection_fraction_lvef" INT, "child_pugh_class" TEXT, "systolic_blood_pressure_sbp" INT, "heart_disease" BOOLEAN, "acute_hepatitis" BOOLEAN, "liver_disease" BOOLEAN, "heart_rate" INT, "NOUSE" FLOAT)

heart rate less than 50 beats / min
SELECT * FROM table_train_38 WHERE heart_rate < 50
SELECT * FROM "table_train_38" WHERE "heart_rate" < 50