This is incredibly alarming ( I am about to board a long international flight).

What is also concerning are some stories in the news – a recent Hawaiin air flight took a nose dive – and others.

Of course – we all hope that the redundancy of having a co-pilot will help the safety of the passengers – BUT the elongated P – R interval is a huge problem.

Random suggestion – I think you would gain a lot if you contacted the NASA Johnson Space Center Cardiologist (T.S.)