Date: 201507
Local time of day: 1801-2400
Location: ZZZZ.ARTCC, FO
Flight conditions: VMC
Aircraft: B757 Undifferentiated or Other Model
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Cruise
Reporter organization: Air Carrier
Reporter function: Pilot Flying; Captain
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Human factors: Troubleshooting; Time Pressure
Second reporter function: Pilot Not Flying; First Officer
Anomaly: Deviation / Discrepancy - Procedural Weight And Balance; Flight Deck / Cabin / Aircraft Event Illness / Injury
Detector: Person Flight Attendant
When detected: In-flight
Result: Flight Crew Diverted; General Physical Injury / Incapacitation
Contributing factors: Human Factors
Primary problem: Human Factors

Narrative: I was the Captain on Flight from to ZZZZ. At approximately XA40 or there about I was informed by my lead flight attendant about a medical situation in the main cabin. At the time of notification we were approximately 60nm South of ZZZ and just 30 minutes from our Coast out fix. The lead flight attendant informed me that the sick passenger was a white female in her late 30's and there was a doctor and a nurse attending to her.We reviewed our options in case we needed to divert. I made contact with Dispatch and Medlink through SAT Com. Dispatch was updated frequently as well as Medlink.      My concern for updates grew as we closely approached our coast out fix. Little did I know that the situation had gotten worst; apparently the flight attendants were scrambling to get the medical items requested by the doctor onboard our plane.  The AED and Medical kit were released to the doctor with my concurrence. I spoke with the doctor who was treating our passenger and he express his concern to me and the possible diagnosis. The doctor stated that based on his examination the passenger was experiencing diaphoresis; chest pain and shortness of breath. The doctor thought it could be DVT with possible pulmonary embolism or possible infectious pulmonary process. The doctor recommended medical attention for our passenger.   At approximately XB00z we were rerouted to ZZZ1. We made an uneventful landing. The passenger was taken off the aircraft by the awaiting paramedics and transported to the local hospital. Do to the nature of the [situation] we were force to make an over weight landing. Both dispatch and maintenance were notified and noted in the aircraft maintenance logbook.


Second narrative: At about XA00; we were informed of passenger having chest pains/difficulty breathing/vomiting. At approximately XC00 On board physician stated we needed to get plane on ground ASAP as he suspected heart attract or pulmonary embolism. We diverted to ZZZ. Captain [authorized] to land overweight and have IRO remain in crew rest seat due to high workload and short amount of time until we landed (we were below 10;000 feet when he was done coordinating with dispatch and airport ops and I had the opportunity to ask if IRO should come back up). We wrote up overweight landing and inspection was performed by maintenance in ZZZ.


Synopsis: Flight crew diverted while enroute when a passenger was taken seriously ill. They performed an overweight landing and the passenger was deplaned and taken to the hospital.