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Two articles have been published recently as ‘letters to the editor’ in Heart Rhythm online, about the effect of the newly released iPhone 12 on the function of cardiac implantable electronic devices (CIED), if it is held close to a device. In one article, Greenberg et al.¹ first reported inhibition of tachycardia therapy of a Medtronic implantable cardioverter-defibrillator (ICD) when iPhone 12 was kept close to the device. In the second article, Patterson et al.² compared the effect of iPhone 12 and iPhone XS on CIED of different types and models from different manufactures. The authors of these articles have now conclusively documented that the newly released iPhone 12 can interfere with the function of CIED significantly. iPhone 12 temporarily but consistently inhibited detection of tachyarrhythmia, and hence delivery of appropriate therapy in some models of ICD/cardiac resynchronisation therapy defibrillator. In case of pacemakers, one model (Assurity DR, Abbott) went into asynchronous mode when iPhone 12 was held close to the device. This has caused a huge stir among the cardiologists, common people, and patients with CIED. The overwhelming question now is whether this is going to be a significant public health issue

EP Europace, Volume 24, Issue 2, February 2022, Pages 179–180, https://doi.org/10.1093/europace/euab159

A rare coronary angiogram

A 35-year-old woman was admitted with atypical chest pain. Her electrocardiogram was normal. There was no rise in serum troponin level. Echocardiogram showed a structurally normal heart with preserved left ventricular systolic function. Her serum cholesterol was very high (total cholesterol of 7.7 mmol/L with LDL of 5.3 mmol/L) but there was no other conventional risk factor for coronary artery disease. In view of ongoing chest pain and high cholesterol, a coronary angiogram was done to rule out coronary artery disease (Figures 1 and 2; Supplementary material online, Videos S1 and S2). Answer: 3. Anomalous origin of left coronary artery from right sinus of Valsalva with retro-aortic course. Explanation Origin of the left main coronary artery (LMCA) from the right sinus of Valsalva is a rare congenital anomaly with an estimated incidence of 0.04%. It has been associated with sudden cardiac death in young persons. Identification of the course of the LMCA after its origin is important to stratify the risk of sudden death. A computed tomography coronary angiogram (CTCA) will identify the course of the LMCA after its origin but in 1985 Ishikawa et al. 1 described a method to determine the course of the LMCA by conventional invasive Figure 2 Left anterior oblique view. Figure 1 Right anterior oblique view.

European Heart Journal. Acute Cardiovascular Care, Volume 11, Issue 5, May 2022, Pages e2–e3, https://doi.org/10.1093/ehjacc/zuac030