Thanks for the comment. For your information, please find the reference from Marriott's practical Electrocardiography below "Second-degree AV block may be intermittent (Figure 18.10A) or continuous (Figure 18.10B). Note that in Figure 18.10A, the second-degree block occurs only after a sequence of six conducted beats, of which the first shows no AV block and the latter five show first-degree block (7:6 block). In Figure 18.10B, there is continually alternating first- and second-degree AV block with a 2:1 AV ratio. This finding is termed 2:1 (AV) block. page 401.
This is not Mobitz Type II. In Mobitz, beat drop is necessary. Here, the rythym is pretty regular. This is rather a high degree AV block with 2:1
Thanks for the comment. For your information, please find the reference from Marriott's practical Electrocardiography below
"Second-degree AV block may be intermittent (Figure 18.10A) or continuous (Figure 18.10B). Note that in Figure 18.10A, the second-degree block occurs only after a sequence of six conducted beats, of which the first shows no AV block and the latter five show first-degree block (7:6 block). In Figure 18.10B, there is continually alternating first- and second-degree AV block with a 2:1 AV ratio. This finding is termed 2:1 (AV) block. page 401.