Diabetes is the first med-tech sphere that is coalescing for Verily Life Sciences LLC, but cardiology could be next. The South San Francisco-based business that’s part of Google parent Alphabet Inc. has received a second FDA clearance for its Verily Study Watch as an irregular pulse monitor. After a 2017 debut, it was first cleared by the agency about a year ago for use to take an on-demand electrocardiogram (ECG).