43 1 714 (2010) P 3 1) 1, 2) 2) 1, 2) 1, 2) 1) 2298501 11771 2) 2298501 11771 2010 12 6 Familial Three Cases of Labrador Retriever with Negative P Wave Ryota IINO, Yoko FUJII, Hiroshi TAKANO, Takuma AOKI and Yoshito WAKAO Faculty of Veterinary Medicine, Azabu University, 11771 Fuchinobe, Sagamihara 2298501, Japan 3 II P X P P P P 42 1 714 (2010) P II 1) P P 2, 3) 3 QRS 7
P P 1 1 1 II, III, avf, V10 P 10 mm/mv, 50 mm/sec. 1 1 3 24.8 kg 38.7 120 / 24 / CBC X 10.1, 60.1 B M II, III, avf P 1 P (0.08 sec) 2a PR (0.08 sec), QRS (0.05 sec, 1.3 mv), QT (0.18 sec), T 0.5 mv CV6LL S (1.2 mv) 0.04 mg/kg 2 1 II a: 150 bpm. 0.08 sec P b: P 10 mm/mv, 50 mm/sec. 8
20 P (0.35 mv) (0.04 sec) PR (0.08 sec) 2b CH1 P P 3 P P 4 P P RR 2 3 3 1 P RR 1 RR 80 2 3 1 3 5 1 24.45 kg 22.0 kg 1 2 1 3 1 P P P QRS P P RR 4 1 P 10 mm/mv, 25 mm/sec. 9
P P P QRS 1 1 P QRS P 60180 / 4060 / 1) 60100 / 190 / 46) 5, 7) 120220 / 4, 7, 8) warm-up cool-down 7, 9) 1 P warm-up cool-down P (AVNRT) slow Kent long RP RR P PR 10, 11) 5) P 10
12) II P 13) P 1214) 15) 16) (Subsidiary Atrial Pacemaker; SAP) SAP 1719) SAP 2022) Boineau 23, 24) atrial pacemaker complex 25) SAP 26) P SAP P 2, 27) 28, 29) 30) P P 31, 32) P 11
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