I was diagnosed with CML (Chronic Myeloid Leukemia) recently, I had no clue!! I went to the doctor for an infection and said I had been short of breath for about 3 weeks. Turns out my heart rate was dropping into the low 40's upper 30's. Well as they monitored that and did blood work they also found the CML. Is this a common thing to have low heart rate with CML? As a coworkers friends daughter was also just diagnosed with the CML she too is having low heart rate issues. Sound like too much to be coincidence.