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CTR (Cardio Thoracic Ratio (CTR)
BY.
R. DJAMANMONA, M.Tr. Kep
Pengertian
Cardiothoracic ratio adalah perbandingan antara diameter tranversal
jantung dengan diameter tranversal thorax. Metode ini berguna
sebagai screening untuk mendeteksi apakah terdapat kardiomegali.
Cardiothoracic ratio biasanya dinilai berdasarkan dari foto thoraks yang
mana diambil secara postero-anterior (PA).
Resiko
Cardiothoracic ratio dipengaruhi beberapa faktor seperti usia, jenis
kelamin, fase saat inspirasi, postur tubuh, bentuk fisik dada, budaya
dan ras
Peningkatan CTR juga dipengaruhi oleh left
ventrikel hypertrophy (LVH) yang disebabkan oleh
peningkatan resistensi pembuluh darah atau
hilangnya elastisitas pada pembuluh darah.
Left ventrikel hypertrophy (LVH) merupakan salah
satu komplikasi yang sering terjadi pada pederita
hipertensi.
Cardiothoracic ratio meningkat seiring dengan
bertambahnya usia. Ketika usia semakin
meningkat terutama pada usia lanjut terjadi
penurunan elastisitas pembuluh darah yang
memicu LVH.
Gambar pengukuran besar cor dengan Cardiothoracic
Ratio (CTR)
Cara Perhitungan CTR
Rumus
 CTR = a + b x 100% =
 c1 + c2/ C
Keterangan
 a = Jarak antara garis median dengan batas terluar cor dekstra
 b = Jarak antara garis median dengan batas terluar cor sinistra
 c1 = Jarak antara garis median dengan batas terluar pulmo
dekstra
 c2 = Jarak antara garis median dengan batas terluar pulmo
sinistra
 ATAU
 c = Jarak antara garis median dengan batas terluar pulmo
dekstra dan pulmo sinistra
Hasil
Nilai CTR normal dibawah 50% atau 0,5,
Jika > 50% atau 0,5 = Kardiomegali
Cara Mengukur CTR (Cardio Thoracic Ratio)

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Cara Mengukur CTR (Cardio Thoracic Ratio)

  • 1. CTR (Cardio Thoracic Ratio (CTR) BY. R. DJAMANMONA, M.Tr. Kep
  • 2. Pengertian Cardiothoracic ratio adalah perbandingan antara diameter tranversal jantung dengan diameter tranversal thorax. Metode ini berguna sebagai screening untuk mendeteksi apakah terdapat kardiomegali. Cardiothoracic ratio biasanya dinilai berdasarkan dari foto thoraks yang mana diambil secara postero-anterior (PA). Resiko Cardiothoracic ratio dipengaruhi beberapa faktor seperti usia, jenis kelamin, fase saat inspirasi, postur tubuh, bentuk fisik dada, budaya dan ras
  • 3. Peningkatan CTR juga dipengaruhi oleh left ventrikel hypertrophy (LVH) yang disebabkan oleh peningkatan resistensi pembuluh darah atau hilangnya elastisitas pada pembuluh darah. Left ventrikel hypertrophy (LVH) merupakan salah satu komplikasi yang sering terjadi pada pederita hipertensi. Cardiothoracic ratio meningkat seiring dengan bertambahnya usia. Ketika usia semakin meningkat terutama pada usia lanjut terjadi penurunan elastisitas pembuluh darah yang memicu LVH.
  • 4. Gambar pengukuran besar cor dengan Cardiothoracic Ratio (CTR)
  • 5. Cara Perhitungan CTR Rumus CTR = a + b x 100% = c1 + c2/ C Keterangan a = Jarak antara garis median dengan batas terluar cor dekstra b = Jarak antara garis median dengan batas terluar cor sinistra c1 = Jarak antara garis median dengan batas terluar pulmo dekstra c2 = Jarak antara garis median dengan batas terluar pulmo sinistra ATAU c = Jarak antara garis median dengan batas terluar pulmo dekstra dan pulmo sinistra
  • 6. Hasil Nilai CTR normal dibawah 50% atau 0,5, Jika > 50% atau 0,5 = Kardiomegali