Hi,
Simon ECG for pulse rate mesurements? Why haven't you suggested
cardiac Catheterization(Most accurate) Haa ha haaa .
Ziege If you can trust the best way to measure pulse rate is to
place your two fingers on the wrist and count it for half minute and
then multiply it by two a count of 65-80 pulses for an individual is
considered to be normal,the age sex of the individual further
determine the "normal value" of blood pressure I havent seen any
Doc measuring pulse rate with some equipment may be they are lazy :).
The idea is to measure the condition
of the heart ,pulse rate in itself is nothing a number of Xducers are
available in the market ultrasonic,piezoelectric,photoelectric,
electroacustic,electrocardiographic,lvdt,magnetostrictive,etc etc....

good luck
sanjeev