3 │ CONCLUSION
A diseased AV conduction system as encountered in our patient may harbor concealed/decremental conduction and is quite susceptible to ‘long-short’ sequences. This can yield interesting interactions between conducted and paced rhythms even at relatively slower pacing cycle lengths. However as showcased here, i) a systematic analysis of device tracings/ECGs, ii) familiarity with magnet rate responses, and iii) appreciation of complex electrophysiological mechanisms at play is quintessential to ‘trouble shoot’ any unusual pacemaker related responses.