Koka Cardiology · Health Policy Research

PCI Access Maps
U.S. & Canada

Interactive maps examining cardiac catheterization lab access by population density and drive time — challenging the conventional narrative on rural PCI access.

United States
Choropleth
United States
United States · 3,143 Counties
Geometric Centroids
Drive time measured from the mathematical midpoint of each county's land area. Overstates distance in large western counties — shown here to illustrate the distortion.
Open map
Choropleth
United States
United States · 3,143 Counties
Population-Weighted Centroids
Drive time measured from where people actually live — Census 2020 population-weighted county centroids. The methodologically correct approach.
Open map
Canada
Choropleth
Canada
Canada · 282 Census Divisions
Geometric Centroids
Drive time from the geographic midpoint of each census division. Uses geometric centroids for all regions — the naive approach, shown for contrast.
Open map
Choropleth
Canada
Canada · 282 Census Divisions
Population-Weighted Centroids
Drive time from population-weighted centroids for major urban census divisions. 28.7% of Canadians live beyond 90 minutes of PCI — vs. 3.5% in the U.S.
Open map