心内科专业 Flashcards

1
Q

IVUS内膜病变表现

A

斑块是致密的,所以表现为白色

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2
Q

IVUS中膜表现

A

由均匀的平滑肌细胞构成,不反射超声波,所以表现为圆型暗区

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3
Q

IVUS外膜表现

A

由胶原组成,反射大量超声波,所以表现为白色

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4
Q

对于非左主干的血管造影临界病变,若血管内超声测得的最小管腔面积大于 4mm2,一般

A

不考虑介入治疗

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5
Q

被IVUS认为是诱发缺血的罪犯病变特点

A

最小管腔面积在 4mm2 以下的血管造影临界病变,伴有面积狭窄大于 60%或斑块负荷大于 80%或病变长度大于 2 厘米

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6
Q

IVUS面积狭窄的计算

A

为参考部位的管腔面积减去病变处最小管腔面积的差与参考管腔面积的比值

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7
Q

IVUS斑块负荷的计算

A

为该横截面外弹力膜面积减去管腔面积的差与外弹力膜面积的比值

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8
Q

左主干临界病变的治疗策略选择中, ——是判定病变是否显著的金标准

A

FFR

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9
Q

IVUS示左主干临界病变的最小管腔面积大于—— 时,无须考虑介入干预

A

6mm2

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10
Q

临床通用的 MUSIC 标准把支架置入后横截面积在平均参考血管节段横截面积——以上定义为支架充分膨胀

A

80%

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11
Q

作为心肌损伤的直接体现,右室心肌穿孔会产生心室下壁导联的

A

ST 段抬高

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12
Q

心室游离壁穿孔的直接生理学后果是

A

心包积血

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13
Q

右束支长约 cm

A

5cm

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14
Q

右束支近端由 供血

A

前降支 和右冠的房室结动脉

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15
Q

Lown分级适用于

A

急性 心梗室早分层

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16
Q

室早指数

A

QR’/QT 比值
指室早的联律间期/窦性心率时Q波起点至T波终点的时限

17
Q

室早指数是。 时,危险性大。

A

0.6-0.85