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. Author manuscript; available in PMC: 2012 Feb 1.
Published in final edited form as: Heart Rhythm. 2010 Oct 27;8(2):295–303. doi: 10.1016/j.hrthm.2010.10.032

Figure 5. Correlation between RT-MRI findings during lesion formation (T2w-HASTE) and macroscopic tissue samples.

Figure 5

(A) T2w-HASTE image acquired 20 seconds from the start of a 20W ablation for 90sec (impedance 100 Ohms) shows a lesion in the posterior wall of the RA (small green arrow). This lesion measured approximately 5 mm in diameter by 2 mm in depth on macroscopic examination, large green arrow on (B). On (C) a T2w-HASTE image sequence acquired obtained during the first 20 seconds from the start of a 20W ablation for 120sec (impedance 95 Ohms) shows a lesion in the cavo-tricuspid isthmus. This lesion measured approximately 10 mm in diameter by 4 mm in depth on macroscopic examination, large green arrows on (D) and (E). LA: left atrium, RA: right atrium, FO: fosa ovalis, CS: coronary sinus os, and TVA: tricuspid valve annulus.