A Study to See How RO7763505 Works and How Safe it is When Given to Healthy People and People With Stable Heart Disease

Inclusion Criteria: Part 1: * Healthy biologically male and female participants of nonchildbearing potential or childbearing potential with no clinically relevant findings on physical examination at screening or baseline (assessed either on Day -2 or Day -1), including detailed medical and surgical history, vital signs, 12-lead electrocardiogram (ECG), hematology, blood chemistry, serology, and urinalysis * No suspicion of cognitive impairment/dementia as judged by the Investigator Part 2: * Myocardial infarction before the screening visit * Objective imaging evidence (coronary computed tomography \[CT\] angiography or invasive angiography) of coronary atherosclerosis Participants who underwent percutaneous coronary intervention (PCI) or coronary artery bypass graft (CABG) are eligible if the procedure was done \>6 months prior to screening * A diagnosis of stable CAD, defined as being on stable guideline-directed medical therapy (GDMT) if tolerated for at least 90 days prior to screening with no planned changes or scheduled interventions during the study * QTc of \<= 450 milliseconds (ms) as determined by a single 12-lead ECG recording. If the initial ECG result of the triplicate is exclusionary, consecutive repeat ECG results must be within the acceptable limits. In participants with a stable bundle branch block where the QRS duration is \> 120 ms, the QTcF will be calculated as: QTcF - (QRS - 100 ms) Exclusion Criteria: Part 1: * Any condition or disease detected du…