PMC6174779_01
Patient A. Ventricular rate 149, SVT.
CRIEM2018-1387207.001.jpg
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fig1
Her arrival electrocardiograph (ECG) revealed regular narrow complex tachycardia (see Figure 1).
Patient A. Sinus rhythm, ventricular rate 75, and postconversion.
CRIEM2018-1387207.002.jpg
PMC6174779_01_CRIEM2018-1387207.002.jpg
fig2
She did this and converted to sinus rhythm (see Figure 2) within five breaths.
PMC6174779_02
Patient B. 12-lead ECG, ventricular rate 138, and SVT.
CRIEM2018-1387207.003.jpg
PMC6174779_02_CRIEM2018-1387207.003.jpg
fig3
SVT (see Figure 3). She was subjected to the similar head down deep breathing (HDDB) maneuver as described above and converted to sinus rhythm without any complications.