Monitoring Spike Potential and Abrupt Impedance Rise with Concomitant Temperature/Contact Force Change for Timely Detection of the Occurrence of “Silent” or “Nonaudible” Steam Pop

<div>(a) The time from the initiation of RFCA to the occurrence of audible SP was 8.6 s. The sudden impedance rise after 8.9 s of RFCA coincided with a SP. Immediately after the SP, an abrupt impedance rise of 5.8 Ω, temperature drop of 2.1°C, and CF without discernible change were recorded. (b) A spike potential without consequent PAC was recorded immediately during the occurrence of SP. (c) The location of the SP is at the anterior-superior wall of the RIPV.</div>

Journal of Interventional Cardiology

fig4

Figure 4

Figure 4: Monitoring Spike Potential and Abrupt Impedance Rise with Concomitant Temperature/Contact Force Change for Timely Detection of the Occurrence of “Silent” or “Nonaudible” Steam Pop 

Figure 4 | Monitoring Spike Potential and Abrupt Impedance Rise with Concomitant Temperature/Contact Force Change for Timely Detection of the Occurrence of “Silent” or “Nonaudible” Steam Pop 