| Type of Block |
Criteria |
Significance |
| First
Degree AV Block |
PR interval >0.2 sec |
little
|
|
|
lengthining PR intervals until blocked
P-wave |
possibly significant
|
| progressive RR shortening
until blocked P-wave |
| RR interval containing
the blocked P-wave is shorter than the sum of the two PP intervals |
|
|
regular blockage of P-wave |
very significant
|
|
|
no relationship between P-waves and QRS
complexes |
critical importance
|
|
links above for more detail....
interpreted from Chou Electrocardiography in
Clinical Practice Fifth edition (441)
|
