Actually, an airliner can usually descend and land within 10-15 minutes in an emergency, assuming a suitable runway is close by. There are more smaller airports with 5000 ft runways that don't typically handle 737s or larger.
The problem with emergencies at major airports is that between EMTs and fire services inspecting the jet, that runway is out of service for at least 30 minutes.
On a normal flight a 737 flies an approach at under 180kts but the approach limit is a lot faster. In a cardiac arrest type situation, the pilot may decide to fly a faster approach into an airport with medical services available. They would still touch down at the normal speed.
The problem with emergencies at major airports is that between EMTs and fire services inspecting the jet, that runway is out of service for at least 30 minutes.
On a normal flight a 737 flies an approach at under 180kts but the approach limit is a lot faster. In a cardiac arrest type situation, the pilot may decide to fly a faster approach into an airport with medical services available. They would still touch down at the normal speed.