The population was 941 at the 2010 US Census. Inventory of the town, village and city archives of Vermont, no. 10, Orleans County, vol. I, town of Albany, village of Albany, can be viewed online. History of Albany, Vermont, 1806-1991, by Virginia Wharton (1991) - find this book in a library.
Series of events that constitute a complete heartbeat. Pressure in heart changes. 70% of blood enters ventricles prior to atrial contraction. 30% of the returning blood is pushed in the ventricles.
Active filling from atrial systole contributes about 20% of the blood volume to the ventricles during diastole (in contrast with the 80% from rapid, passive filling in mid diastole). Normally, active filling is silent, but when blood impacts a stiff, non-compliant ventricle, the result is a fourth heart sound (S4) .