Syed Haseeb Raza Naqvi, Madiha Fatima, Pir Sheeraz Ali, Maqsood Alam, Muhammad Taha Khan, and Faisal Qadir, “Positional syncope occurring just at the right time in a patient with a permanent pacemaker: a case report”, J Pak Med Assoc, vol. 71, no. 10, pp. 2461–2463, Jul. 2021.