Lai N C, Graham J B, Lowell W R, Laurs R M
Exp Biol. 1987;46(4):187-92.
Pericardial, ventricular, and dorsal aortic pressures, and blood flow were measured in tabled, anesthetized albacore tuna, Thunnus alalunga (7.8-10.7 kg) captured at sea off Monterey, California (USA) during August 1985. Mean pericardial pressure was -10.0/-2.6 cm H2O (Systolic/Diastolic, [S/D]) and mean pericardial pulse pressure was 7.5. Heart rate averaged 87 beats per minute. Mean ventricular pressure was 97.0/12.9 cm H2O [S/D] and mean dorsal aortic pressure was 64. High ventricular and dorsal aortic pressures of albacore reflect the perfusion requirement of its metabolically active tissues and compensate for the energy losses resulting from blood flow through the gills to arterial heat exchanger to capillaries and again back to the venous heat exchanger. As in elasmobranchs, the remarkably high pericardial pulse pressure, large pericardial volume, and negative pericardial pressure in the albacore suggest that its pericardium is more rigid than that of most teleosts and thus facilitates cardiac filling. Published cardiac output values for most non-tunas, when corrected for body size differences, are less than the mean weight specific cardiac output of albacore (29.4 ml/kg per min, range 12.9-51.9).
1985年8月，在美国加利福尼亚州蒙特雷外海捕获了体重7.8 - 10.7千克的黄鳍金枪鱼（Thunnus alalunga），对其进行麻醉后制成标本，测量了心包、心室和背主动脉压力以及血流量。心包平均压力为-10.0/-2.6厘米水柱（收缩压/舒张压，[S/D]），心包平均脉压为7.5。心率平均为每分钟87次。心室平均压力为97.0/12.9厘米水柱[S/D]，背主动脉平均压力为64。黄鳍金枪鱼较高的心室和背主动脉压力反映了其代谢活跃组织的灌注需求，并补偿了血液流经鳃到动脉热交换器再到毛细血管然后又回到静脉热交换器所导致的能量损失。与软骨鱼类一样，黄鳍金枪鱼心包脉压极高、心包容积大以及心包压力为负，这表明其心包比大多数硬骨鱼的心包更硬，因此有利于心脏充盈。大多数非金枪鱼的已公布心输出量值，在根据体型差异进行校正后，低于黄鳍金枪鱼的平均体重特异性心输出量（29.4毫升/千克每分钟，范围为12.9 - 51.9）。
