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. 2024 Jul 20;10(10):752–756. doi: 10.1016/j.hrcr.2024.07.016

Figure 2.

Figure 2

Case 2 with atrial myocardial damage owing to wild-type transthyretin amyloid cardiomyopathy. A: Cardiac 99mtechnetium-hydroxydimethylene diphosphonate scintigraphy. B: Twelve-lead electrocardiogram of low F-wave atrial flutter. C: Failure of mid-IAS fixation with the S5 was due to a high pacing threshold (RAO, LAO). White arrow: 3830 lead. D: The final fixation site using the HIS was located posterior to the compact atrioventricular node (RAO, LAO). White arrow: 3830 lead. Abbreviations as in Figure 1.